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Do you believe you're intelligently designed? or you're a random product of near-misses and incidental changes over a long period of time? Natural selection over billions of years gives the *illusion* of design, even though there is no designer.

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Let's say your body dies today and your thought live remains. Where will you go? No evidence for mind-body duality. Your mind is your brain. When the brain dies, your mind & your "personhood" dies as well. Nothing persists. "When you're dead, you're dead."

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If your nails are dead how do they grow? The nail is pushed forward by living tissue at the nail's base -- works the same way for hair & hair follicles.

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i have not smoked in 5 months, i smoked a blunt lastnight. i have a urin drug test in 18 days i weight 200 lbs will i be clean by then? Probably you'll be ok, assuming the usual threshold of 50 ng/dl. You'll find a lot of misinformation and worthless "folk remedies" for passing the test, but not much you can do about it, except maybe drink lots of water the day of testing to dilute the urine specimen. Forced diuresis (causing high urine production) any earlier than that won't help -- the THC is released from fat into blood into...

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If the statement S → t,T → U are truethen what statement is logically equivalen, mulitple choice in description I'm assuming that t and T represent the same proposition in your question. Also that T stands for a proposition and not the truth tautology. So if S --> T and T --> U then, from transitivity of implication, it follows that S --> U, i.e., that S implies U. But if a statement is true then so is its contra-positive, in this case: not-U implies not-S. So the answer is (1).

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Someones dealt 2 cards from a deck of 52 cards whats the probability they receive a blackjack Oops -- my final answer should be 4.8264% - about one in 21, nowhere close to 50%. Darn decimal point...

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Someones dealt 2 cards from a deck of 52 cards whats the probability they receive a blackjack A blackjack consists of an ace paired with either a 10, J, Q, or K. There are 4 aces in the deck and 16 cards ranked 10-K. The probability of dealing an ace first is 4/52. The probability of next dealing10-K is 16/51. The probability of both of these occurring is the product (4/52)*(16/51) = 64/(52*51) = .02413... But there are equally many chances of dealing 10-K first, then ace. The...

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Do you know anyone who appears to be the missing link? My brother-in-law.

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Why did God create animals? This is a science forum. In science we seek naturalistic explanations for the physical world and philosophically don't recognize anything supernatural, such as deities. Your question is loaded with an assumption, "God created animals", that is not recognized in science. In the view of evolutionary biology, animals emerged from the complexity of life. You could spend your life learning HOW...

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Fatorise this equation x^4-16 For some reason I can't see all previous answers, so sorry if duplication... I presume you mean factorise this *expression* as it's not an equation and you don't factor equations. It has the form of DIFFERENCE OF SQUARES a^2 - b^2 - (a+b)(a-b) (Learn this formula) Also note x^4 = (x^2)^2 (square of a square) and 16 = 4^2 (2nd grade) So x^4 - 16 = (x^2 + 4)(x^2 -4) using the above identity...

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what makes the earth spin on its axis Angular momentum is a conserved quantity. So the present-day spinning is left over from the Earth's formation from a swirling cloud of dust & gas. It's always been spinning.

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Do theoretical physicists have any evidence for their theories? Why should we believe anything they say? Certainly. Otherwise it's mere speculation or hypothesis. The purpose of scientific theory (in the strict scientific sense) is to broadly explain many physical observations using the simplest possible assumptions. The big bang theory of cosmology, for example, explains the cosmic microwave background radiation, observed relative abundances of hydrogen and helium, & Hubble's law of universal...

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Extending trigonometry question. Pleas help?!?! Hint: (5,12,13) is a Pythagorean triple, i.e., the sides of a right triangle. 5^2 = 25 12^2 = 144 13^2 = 169 25 + 144 = 169

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In the anatomical position your thumb is______________? toward the outside of the body (palms facing forward)

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If a guy you didn't like was hiding from a swarm of bees, would you point to his hiding place hoping the bees would find him? Bees don't read human body language and have no idea that you are "pointing" at something.

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How the bloody hell do i solve equations ... The trick is to figure out how to isolate the variable so you end up with something like "x = ..."

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Can the sine or the cosine function ever equal 5? No. Sine and cosine values are limited to the range +1 (max) to -1 (min). Picture coordinates of points on a unit circle. This is a very basic concept that you should completely understand.

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Is it a sin to masturbate alone? cosin, not sin

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How many seconds are in a third? If by "seconds" you mean "halves", then the answer is (1/3) / (1/2) = 2/3. There are 2/3 of one-half in one-third. While we use ordinal numbers to indicate fractional denominators (thirds, fourths, fifths, etc.), the fraction 1/2 is referred to as a "half" and not a "second."

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how do we add irrational numbers? Addition is well-defined for all real numbers. It's just that irrationals can't be expressed as simple decimals or fractions (they have an infinitely long non-repeating series of decimal digits) so their sum might not have a simple notation the way rational numbers do. For example, we can compute that (1/2 + 1/3) can be simplified as 5/6. But (√2 + √3) is already in simplest terms. Some...

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An Helium balloon ......... read below Here's how I'd approach it. 1) Buoyancy is related to the difference in densities. The densities of air and helium at 1 Atmosphere can be obtained. Their difference creates the buoyancy. A mass of 85 Kg (about 187 pounds) divided by the difference in densities between air and helium will give the required balloon volume. Multiply volume by density of helium to get the mass. Since helium has an...

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Does anyone know the specs on the telescope used by Copernicus to view Jupiter and its moons? Lens size, length, etc. A typical Galilean telescope with which Jupiter's moons could be observed was configured as follows. It had a plano-convex objective (the lens toward the object) with a focal length of about 30-40 inches., and a plano-concave ocular with a focal length of about 2 inches. The ocular was in a little tube that could be adjusted for focusing. The objective lens was...

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Why is anything raised to the power of zere equal to one? Power tells you how many times the base number is used as a factor for multiplying. For example, a number raised to the 5th power indicates that it appears five times as a factor. When you multiply you can always insert additional factors of 1, since multiplying by 1 does not change the value. (It's similar to how adding zeroes does not change a sum.) In other words, there's *always* a factor...

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When your time is up how do you get it down? You take "down time."

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Explain to me how an object of large mass, say, the Earth, creates gravity. Why does the smaller object orbit the larger object? The smaller object doesn't actually orbit the larger -- they both orbit their common center of mass. Two equally massive bodies will orbit a point midway between them. If one body is much heavier than the other, however, then the center of mass will be close to the heavier body's center. Thus the Moon appears to orbit the Earth when, in fact, the center of mass is only partway below the Earth's...

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What is the four color theorem? Four colors suffices (you don't need more than 4) to color any map so that adjacent regions (sharing a common boundary) are all different colors. It was an unproven conjecture until the 1970s, when it was "proven" by a computer program -- still some controversy about the proof.

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The components of DNA have been confirmed to exist in meteorites, researchers stated. Does that mean we are all extraterrestrials? Actually what they found were molecular components of DNA -- still pretty amazing. I don't think this finding supports the panspermia hypothesis over local abiogenesis. What it suggests, however, is that DNA might not be as exotic as we think. Thursday, Aug. 11, 2011 http://www.time.com/time/health/article/0,8599,2087758,00.html IMAGE...

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Since all science is inductive (based on limited observation of patterns), to what extent does science prove anything? Are all scientific conclusions ultimately reducible to theoretical speculation? If so, how can we ever speak of causes in nature? "All science is inductive." Not so. The scientific method combines physical observation with DEDUCTIVE reasoning, allowing facts and laws to be established with high levels of confidence ("proof"). The INDUCTIVE part comes into play when formulating new hypotheses, i.e., making educated guesses about the outcomes of future observations, based on what's already known. Then the cycle starts all...

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Why earth rotates from west to east & why not from east to west? Think in terms of angular momentum. The vast cloud of dust and gas, from which the solar system formed, had some net angular momentum -- an axis around which there was net rotational motion of all the particles. It's no coincidence, then, that Earth orbits the sun in the same rotational sense that it rotates on its axis, and that all planets orbit in roughly the same plane, and most planets...

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Did the big bang actualy happen? Big bang cosmology rests on three solid pillars of evidence. First is the uniform expansion of the universe according to Hubble's law, discovered in the 1920s, where objects are rushing away from each other at a speed proportional to their distance. Second is cosmic microwave background radiation, discovered in 1965, that closely agrees with predictions made by the equations. Third is the...

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What theorem would I have to apply to a quadrilateral inside a semicircle? Angles in the same segment are equal.

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Do you think humans will ever discover an afterlife? No. When you die the brain disintegrates. Everything that is your mind, your memories, your "personhood" ceases to exist within 5 to 10 minutes. It's a one-way process than cannot be undone any more than unbreaking an egg. Afterlife is a comfortable fiction by which people avoid confronting the fact of their mortality.

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Is it wrong if i like school but my favorite subject is math? I liked school and math was my favorite subject, too. Strength in math represents ability at abstract reasoning and and analytical view of things -- qualities that will be very useful no matter what your chosen career.

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THE software installer has 4 letter identification codes. if each letter can be used only once, how many diff. ways can it be arranged? Assuming there are 26 letters to choose from initially, the total number is 26*25*24*23

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16000psi is needed bend a metal beam, how fast would i have to drive a 4tonne truck into it before it bends? I don't think there's enough information. It's like asking how high a bathroom scale will momentary read if a 150-pound man jumps on it from a certain height? It depends on time-dependent details of the collision that are not given.

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You enter a competition with 100 contestants so have a 1% chance of winning. You repeat the same competition. Would your chance then be 2%? It would be roughly, but not quite, 2% after two tries. I'll assume that if you win the first competition there's no point in repeating it. So your total chance of winning is 1/100 + (99/100)(1/100) = 0.0199 = 1.99%. Another way of looking at it is that your chance of losing either round is 99/100 = 99% = 0.99 So the chance of losing both rounds is (.99)^2 = .9801 The chance of winning = 1 -...

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Do animals go to "heaven" or "hell" when they die, or have any afterlife? Science has no answer to this question. It is a religious / metaphysical issue beyond the reach of observable physical evidence.

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what is the answer to this problem? 2a5 + c2 if a = 2 and c = 4 It might mean that if a=2 then 2a5 = 225 and if c=4 then c2 = 42. Just substituting symbols for digits as in cryptarithm puzzles. Not really algebra. In that case the answer would be 225 + 42 = 267.

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What positive fraction smaller than 1 is equal to itself when inverted? For all real numbers a (except 0) if |a| less than 1 then |1/a| greater than 1. [Using "absolute value" function; for some reason the 'greater than' and 'less than' symbols get messed up here.] If a is positive as well then 1/a isn't smaller than a in either sense of "smaller" (more to the left or closer to zero, on the number line).

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for the mathematicians out there: (2n+m)/3=integer (n,m integers) does it follow that (2m+n)/3=integer ? Yes, it follows. This involves congruence relations in modular arithmetic. If x/3 is an integer, then we say x is congruent to 0 modulo 3: x == 0 (mod 3) (using == to represent the triple equals sign ≡ normally used for congruence) We are given 2n+m == 0 (mod 3) for integers n and m clearly 3n+3m == 0 (mod 3) ...adding multiples of 3 always gives a multiple of 3... Subtract the upper...

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why do farts smell like ass The smell comes from the same source: intestinal microbes that release noxious gases as they metabolize substrate in feces.

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When twins are born, what measures are taken in the hospital to ensure they don't get muddled up? ID bands are applied to the wrist or ankle in the delivery room shortly after birth. Initially they are identified as A (first born) and B (second born). The 3rd triplet is C, and so on.

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Is any company in the world today developing a supercomputer that is the most closest thing to a self-aware Artificial Intelligence (A.I.)? Nobody knows how, even in principle. We don't even understand HUMAN self-awareness!

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Someone please help me for the geometry regents: How do I prove a rhombus is not a square? You can't prove it -- it follows purely from the definitions of terms "rhombus" and "square," and is not really a theorem to be proven. A square is a kind of rhombus, i.e., some rhombuses are not squares because they don't have right angles. (Somewhat off-topic, a square is also a kind of rectangle, which is a kind of parallelogram, which is a kind of trapezoid, which is a kind of...

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how is it possible that the sum of a infinite series add up to a finite value? it doesn't make sense intuitively. Your confusion was shared by the great thinkers of antiquity like Zeno of Elea. One of his famous paradoxes notes that to move from one place to another, an object must first cover half the distance to its destination. Then it must cover half the remaining distance, and so on. There are an infinite number of steps during which it covers only half the remaining distance, never quite arriving....

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How do you find the center of 2 concentric circles by using 2 parallel lines and a ruler? Given two concentric circles, all you need to find their center is a straightedge and compass. Any line tangent to the inner circle will intersect the outer circle at two points. Construct the perpendicular bisector line between these points (a well-known procedure). Then repeat the above using a *different* tangent point on the inner circle. The bisectors meet at the circles' center.

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Why is this calculation correct?:D 102 + 22 = 201 With digits 0, 1, and 2 you are using base-3. So the digits represent (right to left) 1s, 3s, 9s, 27s, 81s, etc -- the powers of 3. Hence 102 (base 3) = 1*9 + 0*3 + 2 (decimal) = 11 (dec) 22 (base 3) = 2*3 + 2 = 8 (dec) 11 + 8 (dec) = 19 (dec) = 2*9 + 0*3 + 1 = 201 (base 3) You could line them up and do long addition: 102 +022 ---- Start on the right, working leftward by columns just as in...

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Do you know HOW to use a slide-rule and/or an Abacus? If so, DO you use one? Why? They didn't invent hand-held calculators until around 1972, after finishing all my math and physics studies. I had a Post Versalog "professional" slide rule that routinely gave 3 significant figures but often 4 sig figs using log-log scales. You had to figure order of magnitude in your head. I've got a few abacuses (abaci?) for decoration but never learned to use them.

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If f(x)=x^2-2x+1 and g(x)=x-1 what is (f/g)(x) please help fast. =/ Just remember that f/g is undefined at x=1

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How many systems of mathematical induction can you count quickly? Examples: 1 2 3...4 16 256.... Online Encyclopedia of Integer Sequences: http://oeis.org/

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How many times should the average healthy human being poop? Every 2 or 3 days for a bowel movement is normal, assuming well-formed stools, eating a normal diet with no indigestion. There are people who poop every day or more, but it's not required for health. Notwithstanding many false claims to the contrary... The GI tract seems to set its own speed and it's best not to tamper too much. Regulate your dietary fiber so you get enough but not too much....

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The two segments tangent to a circle from a point outside the circle are congruent. Why? Two lines tangent to a circle at opposite points (connected by a diamter, making a 180-degree arc between them on the circle. They intersect "at infinity" making an angle of zero. As the intersection point moves closer to the circle, the tangents intersect at some angle & subtend a smaller arc on the circle. As the point approaches the circle itself, the tangent points approach each other...

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If x is the geometric mean between q and r, solve x in terms of q and r. x = sqrt(q*r) where sqrt means square root and * means multiplication. You really aren't solving for x -- more like defining it.

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what is the pharynx also called throat

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How is gas formed in the gut? It's a metabolic waste product of the massive bacterial flora in the gut. 90% of the dry mass of feces is bacteria, and they virtually all produce gas.

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How many degrees are in a kelvin? One kelvin = one degree on the Kelvin temperature scale. This is the same size as one degree Celsius, i.e., they both measure the same difference in temperature, though differ greatly in the location of zero. One kelvin is also 5/9 of one degree Fahrenheit.

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What does the word"halogen"mean? Literally, "salt former" (halo- = salt; -gen = formation)

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why arent the pulmonary cirucuit and lungs operative in the fetus Fetuses don't breathe. They obtain oxygen from the maternal circulation.

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Is there a scientific basis for race? No. Obvious phenotypic differences among populations of humans (i.e., skin color, facial features, etc.) are just that -- phenotypical variation from a few genes out of tens of thousands that distinguish each individual. Genetically there's no more variation between so-called races than there is among them. If an American needed a kidney transplant and were searching for a perfect match, he'd...

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Can someone please explain what exactly an EVP is? Auditory pareidolia. It's a form of hallucination, where you perceive something that isn't really there. It's what our human brains -- which excel at finding patterns from noise -- do when presented with random input. The claim that it represents something real (e.g., ghosts) is hilariously naive and flies in the face of zero evidence.

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If a one-sided person undresses, is it a Mobius strip? ...only to music by a Mobius band.

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In science and technology what is something good to start looking into?? (to research and learn about) This is an exciting time in molecular biology -- we are starting to bridge the gap between microscopic and atomic. Protein structure (folding, unfolding, non-folding) is undergoing exciting new insights. Evo-devo is also still a hot topic -- research in how animals develop from eggs.

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The sum of first 10 odd numbers is 100, find any five numbers from those(First 10 odd numbers) whose sum is 50? WHLB is right. It's asking to find 5 odd numbers whose sum is 50. Of note, however, is that the series obtained by adding successive odd numbers forms the squares of the integers: 1 = 1 4 = 1 + 3 9 = 1 + 3 + 5 16 = 1 + 3 + 5 + 7 etc. In general the sum of the first k odd numbers (1 + 3 +...2k-1) equals k^2 In this case k=10 and the sum of odds 1...19 = 100

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What makes peppers taste hot? Capsaicin, the main active ingredient in peppers, stimulates the same receptor molecules in the mouth and lips that are normally activated by heat or abrasion. Hence the burning sensation.

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Is overpopulation a big problem that has yet to be discussed? Share your answer...

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Prove that the sum of the roots of a polynomial of degree n is -B/A Hey @WarHorseLeBron, take a look at this discussion of sums and products of roots of polynomials...from MathForum.org ("Ask Dr. Math"): http://mathforum.org/library/drmath/view/61024.html

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what is the square root of x squared The question is ambiguous. The square root of (x^2) = |x| = absolute value of x. The (square root of x)^2, on the other hand, equals x if x non-negative and undefined if x is negative.

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if adam can build a fence in 2 hours and sam can build the same fence in 6 hours how long would it take for both of them to build it In this kind of problem, you have to figure the *rates* of fence building measured in fences per hour (fph). When both guys are working, their rates of work add together. But rate and time are inversely related. Adam builds 1 fence in 2 hours = 0.5 fph. Sam build 1 fence per 6 hrs = 0.167 fph. Together they build at the rate of (the sum of above) 0.667 fph. Finally convert back to hours by...

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What does an e at the end of a number mean? ...unless you mean something like "1.23E+12" That's an expression of scientific notation, meaning "1.23 times 10 raised to the 12th power"

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What is 1 plus 1? 1 plus 1 is 10 in binary. While 1 and 1 is 1.

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With all our experience with nuclear plants, why haven't we better protective suits against radiation? The high-energy particles typical of radioactivity can penetrate just about any thin material including lead. Make shielding heavier and they're no longer just "suits" you can just walk around in.

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Please help with this probability question There are 8 students to begin with, so the probability pGirl = 5/8 and pBoy = 3/8. Consider all 4 situations: GG, GB, BG, BB where G & B stand for girl & boy. p(GG) = (5/8)*(4/7) Comment: 4/7 = 4 remaining girls out of 7 remaining students. = 20/56 = 5/14 = 0.357 pGB = (5/8)*(3/7) Comment: 3/7 = 3 boys / 7 remaining students = 15/56 = .268 pBG = (3/8)*(5/7) = etc. = 15/56 = .268 =...

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What long term benefits does natural male enhancement (creams, pills) give you? None. Also no short-term benefits. The vendors benefit from your payments.

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Other than a static one, what were you doing the last time you got an electrical shock? I was changing a pair of electrical switches ganged together in the same box. I had turned off the circuit breaker so the light went out. Much to my surprise the *other* switch was on a different circuit so it was still hot. Whoa! The worst shock was when I was a kid, standing on a concrete basement floor without shoes, touched a hot wire & it literally threw me across the room. Double whoa!

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Why do people now think that the big bang is a fact not a theory? Big bang cosmology rests on three major lines of evidence: (1) Hubble's Law -- the uniform expansion of the universe; (2) the relative abundances of hydrogen & helium, where there is excellent agreement between theory and observation; (3) the cosmic microwave background radiation (CMB), aka the big bang's "afterglow." When I was a lad in the 1960s the big bang was merely an unproven...

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Why do people now think that the big bang is a fact not a theory? Share your answer...

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What is the rule from x to y? Triangular numbers -- http://mathworld.wolfram.com/TriangularNumber.html y = x(x+1)/2 Note than y = 1 + 2 + 3 + ... x

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Find x in the rectangle? I can't the image to load, but based on other images posted above, it looks like you use the fact that the bottom triangle with the 15 degree angle is isosceles (based on the symmetry of a rectangle), so the triangle has two 15-degree angles, making the vertex angle 180 - (15+15) = 150 degrees. But this is seen to be the supplement of x (together they form a straight line) so x = 180-150 = 30...

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Why cant we predict earthquakes accurately? Continental plates slide sideways at earthquake fault zones. They stick together for a long time, building up huge forces without moving, followed by an occasional sudden slippage that releases energy to cause an earthquake. Scientists have no way of knowing exactly when and where the force will suddenly give way to slippage. It's a very complex system, probably chaotic and therefore...

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What are the steps to the scientific method? 1. Study what is already known about the topic. 2. Use inductive reasoning to formulate a hypothesis. 3. Make observations according to some design. 4. Apply deductive reasoning to make sense of these observations. 5. Confirm or refute your hypothesis. This is probably not what they taught you, but it's the core principle of science.

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My professor told me that there is a perfect square under the radical here. sqrt(8+4e^(4t)+4e^(-4t)) Help a brother out? Show me how? Start with the formula for a perfect square: (a+b)^2 = a^2 + 2a*b + b^2 If you set a = e^2t and b = e^-2t then a^2 = e^4t and b^2 = e^-4t while a*b = e^(2t)*e^(-2t) = e^0 = 1 So you see that [(e^(2t) + e^(-2t)]^2 = e^(4t) + 2 + e^(-4t) All that remains is to multiply the previous line by 4: 4*(e^2t + e^-2t)^2 = 4e^(4t) + 8 + 4e^(-4t) So when you take the square root you get: 2(e^2t + e^-2t)

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Does a room get warmer faster by setting the thermostat at a higher temp and then lowering it once the desired temp is reached. Usually not, because most thermostats act merely as on-off switches -- they either call for heat or they don't, not affecting the rate of heating. The exception is in some systems that combine a heat pump with electric resistance heating, where the heat pump heats slowly for room temps a little below the desired setting, but the resistance heating kicks in for room temps far below the...

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Odds that A speaks truth are 3:2 and the odds that B does so are 5:3. In what percentage of cases are they likely to contradict each other? First, convert from odds to probability (they're not the same thing). The probability (call it Pa) that A speaks the truth is 3/(3+2) = 3/5. Likewise Pb = 5/(5+3) = 5/8. So the probabilities of falsehood are 2/5 and 3/8, respectively. That is, 1-Pa and 1-Pb. For A and B to contradict each other then either (A and not-B) or (not-A and B). So we must compute (Pa)(1-Pb) + (1-Pa)(Pb) = (3/5)(3/8)...

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a person's car traveled 60 miles in 45 minutes. How many miles per hour was it traveling? The word "per" can be translated mathematically as "divided by." So 60 miles per 45 minutes is a speed of 60/45 miles per minute 60/45 -- divide numerator & denominator by 15 to get 4/3 miles per minute. 60 minutes = 1 hour (4/3 mi/min)(60 min/hr) = 240/3 = 80 miles per hour. Note that minutes "cancels out" Not so tough. You can do the rest. You can even do it in your head if you remember...

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It was stated"the death of the host is a result as harmful to the virus's future as to that of the host itself." Explain the significance Viruses require host cells in which to replicate. If they kill their host then they can't continue replicating.

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why do aniamlas smell after thay die? Micro-organisms (chiefly bacteria) begin consuming the animal -- both from the inside and from the outside. These generate smelly gases as by-products of their metabolism.

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What is the significance of this equation: ΔMi−1 = −∂Σn=1NDi[n][Σj∈C{i}Fji[n − 1] + Fexti[[n−1]] It looks like complete nonsense. The presence of a partial derivative symbol occurring only once, for instance, and preceding a sigma (summation) symbol, makes no sense mathematically or even syntactically. Somebody decided to go wild with mathematical typography. It's so meaningless as to be, as they say, "not even wrong."

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What is Zero times any number, X, where X is not equal to infinity. No need to qualify the number X as "not equal to infinity," because infinity is not a number. It's sufficient to state that any number times zero is zero.

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Practice and practiced; however, I cannot solve for x, please help? Multiply both sides by 3: 4(x+2) = 3(3x-1) Expand: 4x + 8 = 9x - 3 Subtract 4x from both sides: 8 = (9x - 4x) - 3 8 = 5x - 3 Add 3 to both sides: 8 + 3 = 5x 11 = 5x Divide by 5: 11/5 = x

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Out of 10 white, 9 black and 7 red balls, in how many ways can we select one or more balls "One or more" is a tall order. For the first single ball selected: Total number of balls = 10 + 9 + 7 = 26 Probability of White: pWhite =10/26 = 5/13 pBlack = 9/26 pRed = 7/26 Selecting a second ball: Now have a total of nine 2-ball sequences: white-white white-black white red ... red-black red-red For each of the above 9-ball sequences, there are 3 possible colors for selecting the 3rd...

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A and B throw a dice. The probability that A's throw is not greater than B's is I would enumerate (list) all 36 possible outcomes. 1-1, 1-2, ... 6-5, 6-6, where A-B represents their respective throws. Each of these 36 pairs is equally probable at 1/36. In some pairs it's true that "A is not greater than B" and in some pairs it's false. Count the trues. That's the numerator, 36 is the denominator. Good luck working out the details.

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The distance from the middle of a regular hexagon to the midpoint of a side is 15cm. Find the area of the regular hexagon. The hexagon consists of 6 equilateral triangles. You are give an altitude of one of these triangles. Can you take it from there?

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if the zeros at the end of a whole number may or may not be significant, explain why this is so and give a plentiful variety of examples You need to understand the concepts of rounding and significant figures. Mathematically there's no difference between 500 and 500.00 Say I went to a concert and estimated there were 500 people present, just sort of eyeballing it. The true figure was probably closer to 500 than it was to 400 or 600, but that's about all I can say -- rounding off to the nearest hundred. That's one significant...

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how do you simplify x(x2 + x + 1) – x2 = Assuming that by x2 you mean x-squared = x^2... x (x^2 + x + 1) - x^2 = x^3 + x^2 + x - x^2 = x^3 + x = x (x^2 + 1)

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the letter which best completes the sequence below is A D E H I L would come next, if the rule is drop two, write two, drop two, etc. A (b c) D E (f g) H I (j k) L M...

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The square root of 934 lies between what two whole numbers? I assume you're supposed to estimate without resort to a calculator. You know that 30^2 = 900 so it has to be bigger than 30. Consider 31^2. This is (30 + 1)^2 Since (a+b)^2 = a^2 + 2ab + b^2, it follows that (30+1)^2 = 900 + 60 + 1 = 961. Since 934 lies between 900 and 961, its square root must lie between 30 and 31.

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Around 30 percent of all decimal numbers start with a 1. Do you agree? It sounds like you're mis-stating Benford's Law http://en.wikipedia.org/wiki/Benford%27s_law

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Why spherical aberration is not happen in the case of a concave mirror of small aperture? I think it's because when you work out how much spherical aberration deviates from perfectly parabolic optics, it turns out that the normally first-order errors approach second-order near the axis. A spherical mirror is closer to parabolic at small apertures than large.

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Why spherical aberration is not happen in the case of a concave mirror of small aperture? Share your answer...

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Why is it an evolutionary advantage for Staphylococci to be salt tolerant? Where do most Staphylococci live as far as an environmental niche Staph lives on skin. Mammals sweat salt.

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Can two different codons code for the same amino acid? Please help. Yes. There are 64 possible codons but only 20 amino acids. In many cases more than one codon codes for the same amino acid, a property called redundancy that makes some mutations harmless.

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identify the like terms -7a,b,-9b,2,-4a -7a and -4a are like terms because they both have the variable a. b and -9b are like terms because they both have the variable b. 2 is the only constant term.

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In real numbers, what is the solution of 8^2x-1=4^1-x. I am having difficulty with this problem can someone please explain this to me. Thnx. Assuming the given equation is 8^(2x-1) = 4^(1-x) I would recognize that 8 and 4 are both powers of 2 Therefore the equation is re-written: (2^3)^(2x-1) = (2^2)^(1-x) Since (a^b)^c = a^(bc) ...RIGHT?... then we have 2^(6x-3) = 2^(2-2x) so now we can simply equate exponents: 6x - 3 = 2 - 2x Whence 8x = 5 x = 5/8

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is the speed of electrons same-----> 1000amperes and 10amperes??? Electric *charge* travels at (close to) the speed of light -- the speed of electrical current is thus about equally fast in all situations. The speed of the individual electrons that *carry* charge in a metal wire, however, is a much slower drift through the metal -- maybe just a few centimeter per second or so. I don't think this necessarily depends on total current or current density....

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What is the smallest counting number, which when divided by any of the numbers in the set (2, 3, 4,…,9 , 10),leaves a remainder of 1? (5*7*8*9) + 1 = 2521

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What are some easy tricks to help students with reducing or canceling before multiplying fractions? Thorough familiarity with the basic multiplication table -- back to flash cards! At the least, recognizing that all even numbers share a common factor, as do all numbers that end in 5 or 0, etc.

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2 events independant the probabilty of b double the probabilty of a the prob of both a and b occ is 9/32 find the probabilty of a occ The key fact here is that if two events are independent with probabilities p and q, the probability of both of them occurring is the product pq. Here you are given p=a and q=2a So pq = 2a^2 = 9/32 a^2 = 9/64 a = 3/8

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Consider a star in which the first Balmer line of hydrogen is observed at a wavelegnth of 656.4 nm. You have to look up the normal Balmer series to see how the star's wavelength compares to the actual wavelength in a lab on Earth. That determines the redshift, which you can then plug into redshift equations to determine the star's velocity. Note that in astrophysics the redshift is a relativistic doppler effect -- it takes into account not only movement toward or away from the observer but...

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what's 1 - 0.9 repeating? 0.9999... where the digit 9 repeats forever, is another representation of the number 1 exactly. So the answer to your question is: 1 - 1 = 0

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What happens when you divide the fibonacci sequence by the number before and after it.PLEASE ANSWER!!! NEED HELP! It converges to the golden ratio (which see). This theorem was proved by Kepler a few centuries ago.

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what exactly is sunlight? are electrons present in sunlight? Share your answer...

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what exactly is sunlight? are electrons present in sunlight? You are confusing electrons with photons. All electromagnetic radiation -- not just light but also radio waves, microwaves, infrared, ultraviolet, x-rays, and gamma rays -- consists of particles called photons, first proposed by Einstein. Photons have no mass and no electrical charge. Photons always travel at the speed of light. An electron is particle that carries a negative (-1) electrical...

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"If the Milky Way had been [there], we wouldn't have known there were other galaxies until the 1960s" Which place is meant? Thoughts? Not sure I understand the question, but it was originally believed that the Milky Way was a vast collection of stars comprising the entire universe. They had observed "nebulae" as fuzzy-looking clouds, but telescopes weren't good enough until the mid-20th century to resolve them as separate galaxies (collections of stars) in their own right, thus changing our view of the Milky Way as merely one...

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6% of all trucks r found defective.If 5 trucks are stopped and checked,what is the probability that at least one will have defective brakes? In this kind of problem, first you figure the probability P that NONE of the 5 trucks have defective brakes. Then the probability that AT LEAST ONE has defective brakes equals 1-P. The probability that the first truck does NOT have d.b. is 94%. Can you do the rest...?

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Is there a magnet or material that takes out the carbon in carbon dioxide turning it into oxygen? Yes, the chloroplasts in plants do that through a process called photosynthesis. Everything from moss to gigantic redwood trees are made largely of carbon harvested from CO2 in the air, releasing oxygen gas (O2) in the process. You want to build an apparatus to do this on the kitchen table and solve the world's environmental problems? Get in line! Nano-technology might eventually provide a...

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has anyone had a psychic prediction come true? No, never.

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Have bugs always been small? During the carboniferous era (some 300 million years ago) many insects were larger than today (e.g., wingspans of 2 or 3 feet) because oxygen levels were higher (35% compared to 21% today). Since "bugs" (a non-technical term for small land arthropods) rely on passive diffusion for gas exchange in the tissues, this is a big factor. Even today we see the largest bugs only among tropical fauna,...

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Hypothetically, if an identical twin brother and sister had sex, then would the baby look just like one of them when he/she grew up? Identical twins are always both boys or both girls.

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I NEED HELP WITH THIS MATH QUESTION!!! PLEASE HELP!!! You start with undefined terms (for instance, "number" in algebra or "point" in geometry) and use definitions to create new terminology. You also start with postulates (aka axioms) that are assumed true without proof. Then you propose relationships among the objects known as theorems, whose truth is established by proof, which applies deductive reasoning to the system. Each theorem you prove...

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what is a metal used in car batteries Car batteries use lead (Pb) in contact with sulfuric acid.

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What's at the edge of the universe? The universe has no edge. It is "finite but unbounded." Most physicists believe that, in theory, if you travel far enough you will return to your starting point, just like an ant crawling on a globe.

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During a game of Backgammon, my opponent threw 5 consecutive sets of 5&4? What are the odds of this occurring? There are 36 equally possible outcomes of throwing two dice. To get a set of 5 and 4 means either the first die came up 5 and the other 4, or vice-versa. So to get a set of 5+4 represents a probability of 2/36 = 1/18. That's for one throw. For five consecutive throws, the probability is (1/18)^5 Get a calculator and work it out as a decimal or percentage. If the probability is p, the ODDS are...

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What is |3-pi| (the absolute value of 3 minus pi) ? 0.14159265... It's the same as the absolute value of pi minus 3.

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Help find the LCD for the fractions. 5 / a-5 , 6 / a+5 The denominators are (a-5) and (a+5) where (presumably) a is the name of a variable. There are no common factors between them, so the LCD would be their product: (a-5)*(a+5) = a^2 - 25

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Can anyone solve/simplify this math equation? (5n)^8(5n)^4 It's an expression, not an equation (I don't see an equals sign) It can be simplified to (5^12)(n^12) 5^12 could be written out, but it's a very large number

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7 cards numbered 1 to 7 are placed randomly (numbers down) on a table. What is the probability of turning the cards over in the order 1 to 7 1 in 7-factorial = 1 / 7! = 1 / 7*6*...1 = 1 / 5,040 = 0.0001984126984... = about 0.02%

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Astronomers: if the size of the watchable universe is larger than it's age in light years, wouldn't we be able to see the bigbang? As we peer farther into the distance, which is farther back in time, we can't see past a time about 300,000 years after the big bang, when neutral matter condensed from ionized plasma and space finally became transparent. What we see at that time or earlier is just thermal radiation -- the so-called cosmic background radiation -- which is so far red-shifted that its average blackbody...

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What is the name given to all memory keys and what is the category of memory keys called? Do you mean MNEMONICS ?

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I am using distance vs volume of water. Of course, the volume of water is my independent variable. What equation should I use for this lab? Since you don't provide any additional info, such as what this lab is all about, I don't see any connection between "distance" and "volume of water". How do you expect to get a useful answer from anybody? Making a wild guess: Is water shooting out of a hole at the bottom of a bucket?

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the points (3,4),(11,6), and (23,9) all lie on a line. Explain how you can be sure about this without actually drawing the line. You look at the differences (segments) between the points. With 3 points you can compare 2 segments. First, (11,6) - (3,4) = (8,2). In other words, when x increases by 8 then y increases by 2. This makes the slope of the segment (delta-y / delta-x) = 2/8 = 1/4. For the other segment, (23,9) - (11,6) = (12,3). Since 3/12 = 1/4, we see that the slopes of both segments are the same. Conclusion:...

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Does August always have 31 days? Yes. The number of days in each month is always the same, except February in leap years.

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Suppose the area of a rectangle is 24 in2. What are the possible whole number measurments of its length and width? This is more or less equivalent to asking what are the possible factors of 24. Do you see the connection? 24 = 8*3 = 2 * 2 * 2 * 3 = 2^3 * 3 The prime factors are 2, 2, 2, and 3. Two or more prime factors can be combined using multiplication to yield additional factors. Remember that 1 is a factor of every whole number, as is the number itself. This gives the following complete list of...

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What does laser pointer use for? What is a laser pointer used for? What does a laser pointer do? I believe one of those is your question. Laser pointers are pointing devices. The user can visually communicate with other people in a room by pointing at a particular spot (for example, on a projector screen). The laser generates a bright, vividly-colored, highly focused beam that easily stands out from the surrounding background...

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What does laser pointer use for? Share your answer...

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If you have two forces along the same plane, would it be possible to have a vector result in an xyz direction? No. If all the vectors are in the x-y plane with no z-component, the resultant force (the sum of the vectors) will not have any z-component, either (i.e., the component proportional to the unit vector parallel to the z-axis is zero).

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According to evolution, are humans still evolving into some other form, and if so is it something that already exists or something new? There are two reasons why it's difficult to answer your question. The first has to do with the incredibly slow, stately pace of evolution over geologic time. This is where much misunderstanding occurs. Using Carl Sagan's cosmic calendar (where the big bang occurred one year before the present) then Earth formed in September, life emerged in October, the Cambrian explosion was Dec 15, dinosaurs...

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a grocer buys candy for .10cents per package, then marks it up by 100% and then charges 10% tax. What is the final cost? $0.22 It starts out at 10 cents. A 100% markup doubles the cost (right?) to 20 cents. 10% of 20 cents is 2 cents, so the final cost is 20 + 2 = 22 cents.

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Theoretically, if you throw two stones from a building, one big and one small, which would reach the ground first? Not only was the experiment done in Pisa by Galileo hundreds of years ago, it was also done ON THE MOON by one of the Apollo 15 crew, releasing a HAMMER AND FEATHER at the same time and observing them hit the ground together.

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All conscious experience is mediated by brain. So r living organisms not having brain unconscious? Bacteria dosn't know it exists? If by "consciousness" you mean "self-awareness", it's uniquely human or possibly exists to a lesser extent in certain higher animals (apes, dolphins, elephants, etc). It is believed to arise from our large cerebral cortex, a recent evolutionary development. It's clear that bacteria don't know they exist. Neither, for that matter, does a tree, lobster, honeybee, fish or reptile. Exactly how...

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does the term hemorrhage refer only to inernal bleeding or external as well? Both.

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What color are all people in ultraviolet and infrared light? It's well known that people imaged in infrared appear brighter than their surroundings, due to body heat, though you can't actually perceive it as a "color" -- just a glow seen in monochrome imaging, possibly using false colors to indicate how bright the pixels are. In UV it would be more a matter of absorption than emission. The skin might look splotchy, and clothing would have odd dark...

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Can enzymes be viewed through a microscope, if so, what magnification? No. Enzymes are molecules. Although large macro-molecules, they are still too small to see with a microscope because they are much smaller than the wavelengths of light. The largest enzyme complexes might be imaged with an electron microscope.

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What is the difference between stroke volume and cardiac output? Stroke volume is how much blood is pumped with each heart beat. Cardiac output is rate of flow generated by the heart, measured by how many liters are pumped each minute. So multiply stroke volume by heart rate to get cardiac output.

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If a toilet flushes clock-wise in the So. Hemisphere/and counter clock-wise in the No. Hemisphere-->> No, that is an often-repeated myth regarding toilets, sink basins, etc. The actual direction of water swirling around a drain is dependent on the design of the fixture & has nothing to do with geography. The basis for it is the Coriolis force, which is a large-scale phenomenon related to rotation of the Earth. This certainly explains the tendency of cyclones / hurricanes, which may be...

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Tell me if this question is at all difficult, it's going on a quiz that I am writing... There are five binary choices, so the number of distinct configurations is 2^5 = 32. With fewer than 33 computers, it's possible they'll all be different from one another. With 33 or more, duplicates are inevitable.

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How do you remove a magnet that has been nail glued into a BJD's headcap? http://www.ehow.com/how_6353188_remove-skull-cap-bjd.html

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So the Triceratops may not have actually existed. Does this idea offend you in any way? Your information is incorrect. Of course it existed (http://www.examiner.com/x-5439-Geological-Adventures-Examiner~y2010m8d3-Even-though-Triceratops-is-actually-a-young-Torosaurus-Triceratops-is-here-to-stay). What's news is that triceratops is an immature form of another, later-discovered dinosaur called Torosaurus, which now must take the name Triceratops, whose earlier coinage has...

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[ Mathematics ] What is the difference between "Log" & "Ln"....? The LN function (pronounced "lawn") is the natural logarithm, i.e., the log to the base e, where e = 2.718... The LOG function, unless otherwise specified, refers to logarithm base 10.

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Does a proton beam set up a magnetic field? Protons are charged particles, so a beam of moving protons represents an electrical current. All electrical currents set up magnetic fields in accordance with Maxwell's Equations. In this sense it's no different than the magnetic field surrounding an electrical wire carrying a current.

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When you use all of the air in Dust Off compressed air what is left in the can? I guess it would be a residual amount of liquid propellant and a mixture of air and propellant vapor at ambient pressure.

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So just how big can the moon look like from earth? Can it ever look as massive as in the scene from Joe vs. the Volcano? The Moon always subtends an angle of about half a degree (as does the Sun). Its size varies slightly because of changes in distance from the Earth, but not enough to be noticeable except during a solar eclipse. The Moon *appears* bigger when it's near the horizon but this is an optical illusion caused by proximity to familiar objects at the horizon. Photographs, including scenes in movies, can...

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is water the strongest thing on the planet That's on odd answer to an odd question. What do you mean by "strongest"? And how does "water" fit the description?

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What does this function compute? lim((f(x+h)-f(x))/h), h-->0 = ? This is f ' -- aka d/dx(f) -- the derivative of f. The argument is geometric -- it's the slope of the curve, the change in f divided by the change in x. Draw a picture.

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If d letters in d wrd ABSTEMIOUS are arranged at random, find the probability dat vowels & consonants appear alternately? shw working! ABSTEMIOUS has 10 letters -- 5 consonants and 5 vowels. This problem is equivalent to mixing a bag of 5 red and 5 green marbles, then removing them at random with alternating colors. It doesn't matter which type (vowel or consonant) is chosen first. Of the remaining 9, the next must be of opposite type. There are 5 of them, so the probability is 5/9. Next, of the remaining 8, 4 of them match...

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how many different birth orders are possible in a family with six children 6! = 6-factorial = 6*5*...2*1 = 720 This is the number of permutations of 6 things.

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Are these heart palpitations serious? Sounds like PVCs (premature ventricular contractions). They are normal -- everybody gets a 'skipped beat' now and then. Given your age, excellent health, and normal EKG, I would only seek medical attention if they occur more than 6-10 times per minute or are associated with chest pain, shortness of breath, lightheadedness or fainting. Try to quit smoking completely.

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If "i" is the complex number equal to the square root of negative one, can i^i be evaluated as a real number? i^i can be evaluated applying Euler's formula. It's got multiple values -- all real. See http://www.math.toronto.edu/mathnet/questionCorner/itothei.html

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the measure of the supplement of the angle is 35 less than four times the measure of the angle. find the measure of the angle First, you need to know what 'supplement' means. If the measure of an angle is X, then the measure of its supplement is 180-X. The hard pat of 'word problems' is translating them into equations. This one translates as follows: 180 - X = 4X - 35 Do you see why? Can you finish solving it?

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The square root of 107 without using a calculator? Can you find to the nearest hundredth? You know it's going to be a little bigger than 10. Suppose the answer is 10+d where d is the small difference. Then you write (10+d)^2 = 100 + 20d + d^2 = 107 But since d is small, then d^2 is REALLY small compared to the other terms, so you can ignore it. That leaves 20d = 7, so d = 7/20 = 0.35 So the estimate becomes 10.35 This compares well with the actual answer of 10.344... You don't...

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The axis of symmetry of a parabola is x=6. One x-intercept's at (13,0). Where's the other x-intercept? The answer is (C). You're told that one intercept is 7 units to the right of the axis of symmetry (6+7=13). So the other intercept must be 7 units to the left. 6 - 7 = -1.

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What is the domain and range of the function y = 1/(1+x) The function is defined for all real numbers except x = -1. That's its domain. When x = -1 then y is undefined. The function can take on values y of all real numbers except 0. That's its range. There is no number x for which y = 0.

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Find the fifth term of (7x + 2y)^15 Apply the binomial theorem.

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If anyone lives with a electrical tower in their back yard with high voltage of electric running thru it, Do you think it cause ill effects? I believe this has been studied with cattle grazing under power lines. No ill effects have been found. There's no scientific reason to expect that such low frequency electromagnetic fields (50-60 Hz) would cause biological injury or illness.

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One pair of rays connecting one point to each of two other points are opposite rays. What does this tell you about the points? They are collinear with the first point between the other two.

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how many countries are on this planet ? Somewhere around 200.

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Day A has 30% chance of rain and Day B has 30% chance of rain. What are chances of it raining on trip? 1 - (1 - 0.3)^2 = 0.51

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Where is Q in this problem???? Sounds like Q is the point (X,0) along the x-axis where X is the x-coordinate of P.

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trivia: what is a cecilian Better known as a caecilian. According to Wikipedia, they are "...an order (Gymnophiona) of amphibians that superficially resemble earthworms or snakes. They mostly live hidden in the ground, which makes them one of the least known orders of amphibians. All extant caecilians and their closest fossil relatives are grouped as the clade Apoda." Not to be confused with Sicilian -- someone from...

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How much load can 14-2 electrical wire handle? 14-gauge electrical wiring is rated for 15 amps. It should be protected by a 15-amp (or lower) circuit breaker.

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How long would it take for mothballs to take effect in gas tank? Benefits of adding mothballs to fuel is a myth. See, for example, http://www.cartalk.com/content/columns/Archive/1997/February/09.html

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What are the roots of x^4 - 13x^2 + 36? In general, polynomial equations involving 3rd or 4th powers of x are very difficult to solve and beyond the scope of algebra courses. In this case, however, the powers of x in the expression are 4, 2, and 0. This suggests that you treat x^2 as the variable, and solve it as a quadratic, like this: Let z = x^2. Then the equation in z is: z^2 - 13z + 36 = 0 You can factor this as (z-4)*(z-9) (...

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Who developed the slide rule? Napier.

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proof that between any two rational numbers there is an irrational number Here's a nice proof I found on the web: http://answers.yahoo.com/question/index?qid=20100315092743AAUZS6A

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It took John 12 hours riding his bike to make the round trip to his uncle's. If he averaged 20 mph out and 30 mph back, how long? If the distance in miles is D, then the total time in hours for the trip is D/20 + D/30 = 12 Multiply both sides by 60: 3D + 2D = 720 5D = 720 D = 144 miles The trip out took 7.2 hours & the trip back took 4.8 hours 7.2 + 4.8 = 12 (check)

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If you owe a textbook at your school when your about to graduate the 8th grade... Can they keep your diploma? Possibly. They might also hold you back for not knowing how to spell "you're".

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show that the rate of change of the radius of a circle with respect to its circumference is independent of the radius. R = C / 2pi Therefore dR/dC = 1 / 2pi, which is a constant independent of R.

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Four fingers and a thumb but yet five toes, how come the big guy didn't get a name all for himself? Unlike the thumb, the big toe isn't opposable. It has it's own name, however: Hallux.

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find the greatest common factor of the problem..... 32x^2/ 40x^3 = (4 / 5x) * ( 8x^2 / 8x^2 )

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Can people really read minds or are they just guessing? Of course they can't read minds. Google the phrase "cold reading".

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What is the measure of the angle formed by the hands of a clock at 9:40? I'm afraid the 'professionally researched' answer is incorrect. It's a good approximation, but fails to account for the fact that the hour hand has advanced past the 9:00 position. At 9:40 the minute hand is on 8, which is 40/60 = 8/12 = 2/3 of the way around the face. This means the hour hand has advanced 2/3 of the way between 9 and 10. Since the hours are separated by 30 degrees, the hour...

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if you have 100 lottery tickets what is the probability of having at least 2 winning tickts? Not enough information. You need to know how many total tickets there are, plus how many winning tickets there are.

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how many quarks are in the universe? Estimated on the order of 10^80.

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When you 1st learn about dividing they use ÷ to show it, but as you progress through life that is used less and replaced by fractions. Why? In elementary school the focus is on rote memorization of the basic tables, and division of one number by another is taught as a method of computation. The four operations (add, subtract, multiply, divide) each have a symbol placed between numbers. Fractions are approached as distinct from division. Later, when you learn algebra, it's easier to show the division operation between complex...

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Did you hear for a magical number 3964? Prime factorization: 3964 = 2 * 2 * 991 -- nothing magical so far. Poking around the internet, I discovered that 3964 is an example of numbers n with the property that n! has a square number of digits. Not even sure what the question is.

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The scientific name for domestic dogs are "Canis Familaris" but are there names for breeds of dogs? huskys mainly. All breeds of dogs have the same scientific name. They were reclassified in 1993 as Canis lupus familiaris, a subspecies of the gray wolf.

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if you roll two dice , what is the probibility of not rolling a sum of 10? Everybody seems to have missed this one so far. GeorgeGee correctly figured the probability of getting a 10: Three outcomes out of 36 total possible outcomes (5-5, 4-6, and 6-4) which makes 3/36 = 1/12. To see that 4-6 is distinct from 6-4, imagine that the dice are colored red and green so red 4 + green 6 is not the same event as red 6 + green 4. But the question asks for the probability of...

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do you consider masturbating while in a relationship cheating? No, certainly not -- it doesn't involve anybody else. To paraphrase Woody Allen, it's "sex with someone you love."

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if something happens to you that is really unlikley, does it reduce the chances of it happening again? Depends. If the events are truly independent, then NO, one occurrence has no effect on future occurrences. If you win the lottery, for example, your chances of winning another similar lottery are exactly the same as before. If you flip a fair coin 100 times and gets heads every time, the next flip still has 50-50 odds of heads or tails. The notion that you're 'overdue' for a different outcome...

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What does it mean for a number to be rational? I would add that not only do the decimal expansions of irrational numbers go on infinitely, but they do so WITHOUT REPEATING. This is contrast to a rational number such as 1/3, whose decimal expansion is 0.3333... that repeats endlessly.

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Is zero an infinite number? Although zero isn't considered infinite, it's also not considered finite. Numbers that are close to, but greater than, zero are often described as "small but finite". Finite numbers stand in contrast to both 'infinite' and 'infinitesimal', and exclude both infinity and zero.

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What are the holes called that you plug speakers, headphones & microphones into? Jacks. Which receive plugs. Also known as female and male connectors, respectively.

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Why does an incident ray passing through the center of curvature towards a concave mirror reflect back along the same ray? With a perfectly spherical mirror the center of curvature is the center point of the sphere -- equal distance from all points on the surface. Any line (ray) passing through the center intersects the surface perpendicularly to the tangent plane at the intersection point. In reflective optics this means back along the same line. Non-spherical curved mirrors can be modeled as an assemblage of...

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what are two adverbs for think Thoughtfully Unthinkingly

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If you travel from the "center" of the universe faster than the speed of light and you turn around what would you see? In the Big Bang model of cosmology there is no 'center' of the universe. Space itself has expanded from the initial singular point. The universe is an expanding 4-dimensional space-time structure in which all observers see the rest of the universe expanding away from them. Interestingly, this expansion may exceed the speed of light. Relativity, which requires that all mass travels below light...

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Do you think anybody ever really saw "pink elephants" while drunk, or is it just a silly party idea? The phrase is explained here: http://en.wikipedia.org/wiki/Seeing_pink_elephants

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is prepetual motion realy possible No. It violates the First Law of Thermodynamics (conservation of energy / mass-energy) which has never failed experimental verification. You can't get 'something for nothing'.

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My pool loses 1% of water due to evaporation during the week, my pool hold 5,000 gallon, how much water will it lose [update] In reality a 5000-gal. swimming pool is more likely to evaporate at a constant rate (such as 50 gal. per week), as suggested by GeorgeGee, than by exponential decay -- but the question was provocatively ambiguous...

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My pool loses 1% of water due to evaporation during the week, my pool hold 5,000 gallon, how much water will it lose It sounds like you're asking, "What's 1% of 5000 ?" Since 1% = 1/100, you compute (5000 / 100) = 50 gallons lost during the week. Not too tough. Your question looks like it might have been cut off, however. If you want to know what your pool loses over a different time period, say 3 weeks -- assuming you don't add more water & it continues to lose 1% per week as the water level falls -- then...

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factorize completly x^3+x^2+1=0 (x + 1)(x^2 - x + 1) The quadratic has non-real roots -- cannot be factored further.

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how do u find the radius of a circle? Given a circle, to find the radius first find the circle's center point. This can be done as follows: draw a chord (segment intersecting the circle), then construct the perpendicular bisector of the chord. Now draw another chord & find its perpendicular bisector as well. The two bisectors will intersect at the circle's center. The radius of the cirlce is the distance from the center to the...

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Are irrational numbers placed on the number line? The concept of a number line is usually applied to all real numbers. This includes both rational and irrational numbers. So, definitely yes, irrationals are located on the number line.

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Okay, what is the main relationship between science and religion. Any scientists or philosophers to support your answers would be great :) Science seeks to learn about the world only from physical observations and logical inferences, without regard to anything spiritual or supernatural. Religion depends on a 'leap of faith' that goes beyond physical evidence to require supernatural beliefs. They have little to do with one another. Or as Stephen Jay Gould put it, 'non-overlapping magisteria'.

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What will happen if a girl had sex with a hose and he came in her? will his sperm fertilize her human egg or it will have no effect? Did you mean 'horse' ? Anyhow, it's not biologically possible for a woman to get pregnant with sperm from another species.

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Is agnostic where you believe in God, you just don't have a specific faith, or is it not believing in God at all? Agnosticism means 'not knowing' -- in other words, atheism with the provision that you might be wrong & that god might exist after all. Deism is the general belief in a non-personal god who does not meddle in human affairs.

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A transformer has 20 primary winding & 100 secondary winding if the secondary voltage is 25V.How do u find the primary& write it in equation It's a simple ratio -- the transformer steps up the voltage in the primary & outputs it in the secondary by a factor of 100:20 = 5 times greater. So if the secondary is at 25 V then the primary must be at 25/5 = 5 volts.

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we have a really mean teacher that everyone hates.she yells at the kids with disabilities. what can me and my friends do to get her fired? Record her in the act, then bring the evidence to the principal.

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If your son is graduating from High School should you send his invitation to the parents of his lifelong friends who are graduating too? No. They are already invited.

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Is there a specific rule in high school baseball that prohibits load music between batters ? You mean loud ? Probably not but the basics of etiquette & golden rule would suggest that loud music in a public space shared with others might be construed as rude.

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Anyone have a good idea for a school science project? (it HAS to be interesting I remember kida from last year doing the most BORING thing) You need to say what grade level & how much time there is.

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When writing mathematical formulas, why do we always write some letters in lowercase? (continued below) Mathematical notation has a long and complex history. Variables, of course, can be represented by practically any symbol -- but there are traditions that have been set after long centuries of trial-and-error. The use of (lowercase) x and y, for example, is a tradition in basic algebra. The famous constants pi (a lower-case Greek letter) and e (a lower-case Roman letter) are likewise traditional...

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Does X-men really exsist ?? No and no.

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You select 12 people from a group of 30 people that includes 12 men and 18 women what is the probability that the group will be 12 women? The probability that the first person selected is a woman is P1 = 12 / 30 = 2/5 = 0.4 That leaves 11 women out of 29 people, so the probability that the second selection is also a woman is P2 = 11/29 = 0.379... You could figure each choice & find their product P = P1 * P2 *...P12 P = (12 / 30)*(11 / 29)*(10 / 28) *...*(1 / 19) = 12! / (30! / 18!) = (12! * 18!) / 30! Using Windows Calculator...

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What are some ideas for a Pi Day project? Here's something offbeat: Read up on Buffon's Needle. http://en.wikipedia.org/wiki/Buffon%27s_needle " Suppose we have a floor made of parallel strips of wood, each the same width, and we drop a needle onto the floor. What is the probability that the needle will lie across a line between two strips? Using integral geometry, the problem can be solved...to approximate π."

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How should a person feel, if their sister was aborted because their mother said "I don't want to get fat and ugly again"? First of all, it's not your "sister" or brother or any other kind of person -- it's just an embryo. Second, it's your parents' decision entirely & not yours. Of course you're free to feel anyway you want to feel.

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Is Obama addicted to any drugs? Nicotine, apparently. He's still trying to quit...

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In grammer, why is it that, HE SAYS IT ALWAYS is correct and not HE SAY IT ALWAYS ? Because in standard English, the 3rd person singular conjugation of TO SAY is SAYS. (I say, you say, he says, we say, you say, they say). This is a prescriptivist point of view -- rigid rules to be followed. If you're a descriptivist, then what's correct is simply the way most people talk. But there's no question about what is considered 'standard'. It's the same reason you say, "He is" and...

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Find the area of each circle. Use 3.14 for Pie Round your answers to one decimal place. 2.5in 10m 6.4ft 4.1cm 18ft 6.8cm I'll do the first, you do the rest. Area = pi*(R)^2 where R=radius (note the famous constant is Greek letter pi -- not pie!) A = (3.14)(2.5)(2.5) = 19.625 (using a calculator) Rounding off one decimal place: A = 19.6

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Maths question about Masses and Scales. 1, 3, 9, and 27 oz. -- these are powers of 3 -- which totals 40. This problem is an old classic. With these weights in some combination on the two pans of the balance, any integer amount from 1 to 40 oz. can be weighed. Example: You need 17 oz. of some ingredient. Put the 27 oz. weight on one pan, the 9 & 1 on the other, requiring an additional 17 oz. of ingredient to balance.

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classifying without graphing x=6 x=-2 x=6 and x=-2 are both vertical lines parallel to the y-axis. They do not intersect. There are no points common to both.

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what do people mean when they say think outside the box It means think creatively, ignoring the confines of conventional constraints to find a new solution to a problem. The origin is the "9-dot puzzle", where a 3x3 array of dots must be connected with 4 straight lines without lifting the pencil. The solution is to use lines that extend beyond the grid, i.e., outside the box. More info here: http://en.wikipedia.org/wiki/Thinking_outside_the_box

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Is wind consider a gasceous state of matter? Wind is moving air. Air is a mixture of nitrogen & oxygen gases. Air is in the gaseous state.

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What is the definition of TLC? TLC is an abbreviation for 'tender loving care' -- which is pretty self-explanatory. Hope that answers the question.

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Please open link below to see my question. I cannot directly write here. http://img341.imageshack.us/img341/6164/questionv.jpg Share your answer...

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Please open link below to see my question. I cannot directly write here. http://img341.imageshack.us/img341/6164/questionv.jpg Your question is about the function f(x) = (sin x) / x But not sure what the question is. It might help to know that lim(x-->0) of f(x) = 1, so there 's continuity at x=0 and that you can always multiply both sides of an equation by x when x not 0. You can see the full graph of this function here: http://press.princeton.edu/books/maor/chapter_10.pdf

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How much is 110,000 japanese yen in Canadian dollars? 110 000 Japanese yen = 1,267.86707 Canadian dollars (Straight from Google)

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How do line photons create the bright lines in the emission spectrum? When the electron in an atom jumps from an excited state to ground state, it emits a photon of a specific wavelength associated with that energy difference. Because the wavelength is the same for all photons, a bright line, rather than a smeared spectrum, is seen in the spectrometer.

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How can I do these Maths questions? These are so varied in their nature, and each so involved in logic and analysis, that I don't think you can reasonably expect a simple answer here. I think you'd be better off posting each one separately, typed out in full. They do look like interesting problems, however.

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What do you call a scientist that studies the atom Atomic physicist.

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what is einstein famous for Besides relativity and photoelectric effect, he also wrote a famous analysis of Brownian motion that finally confirmed the theory that matter consists of molecules.

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What causes the sudden contraction of your muscles that causes your body to jump when you're on the brink of falling asleep? It's called Hypnic Jerk. Here's a Wikipedia article on it: http://en.wikipedia.org/wiki/Hypnic_jerk

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Why are so many atheists so obsessed with trying to wipe out all belief in God that the most risible arguments will do? I know lots of atheists -- none fits your description of being 'obsessed with wiping out belief'. Mostly they're looking for respite from religious proselytizers who can't seem to keep their supernatural beliefs to themselves. Not that universal enlightenment isn't a laudable goal, but few atheists crusade for anything other than relief from stigma and oppression by the weak-minded,...

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Are our feet supposed to beat its own pulse? If not, since mine does, would this be a fluke of nature that could garner high attention? Your video shows the posterior tibial artery pulse. There's also a palpable pulse on the top of the foot, known as the dorsalis pedis pulse. All pulses in the body represent the cycling of blood pressure in an artery synchronous with the heartbeat. You have only one heart, and therefore one pulse rate transmitted throughout the arteries of the body. It is NOT POSSIBLE to have different pulse...

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Trying to set up an equation. Formula is A=PB If 5 is increased to 8, the increase is what percent of the original number? Thanks. Jennifer 8 is 3 greater than 5. This is an increase of (3/5)*100 = 60%, i.e., 8 is 60 percent greater than 5. The formula A=PB seems irrelevant.

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Please help! I need help with solving and simplifying a rational expressions addition problem: 2x/x-5 + x+1/5-x Thank you! First, since we're limited to typographic symbols, please use parentheses to show what's numerator & what's denominator. So the problem would be written: 2x / (x-5) + (x+1) / (5-x) Comparing the two denominators, you have (x-5) and (5-x). But one is just the negative of the other: (5-x) = -(x-5). So you can re-write the expression using a common denominator (x-5): 2x / (x-5) - (x+1) /...

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has the untied states been back to the moon since apollo 17 No, no manned missions. NASA recently sent a pair of spacecraft to intentionally crash into the moon & analyze the plume -- leading to the discovery of water (ice) mixed into the surface.

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Science equation help? Thermal energy gets converted to work -- they are both forms of energy measured in Joules. Here 1000 J of input does 400 J of useful work (turbine) and 250 J of useful work (engine). The question is to compare 400 with 250. How much more? Answer: 400 - 250 = 150 J. The turbine can do 150 J more work than the engine. Alternatively: How much more? Answer: 150 / 250 = 60 %. The turbine is...

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Why do vicodins make your eyes small? Opioids constrict the pupils of the eye -- the classic narcotic overdose has 'pinpoint pupils'. It's the interaction between the drug molecules, receptors, and the autonomic nerves that control the size of the pupils (normally to regulate light to the eye). Vicodin is an opioid.

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is moonshine kosher? It's unlikely to have undergone rabbinical supervision during preparation.

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Are we really made of star dust? Like in the big bang when the stars were created and crashed together to make all the elements? Yes indeed! Consider this: According to the Standard Model of big bang cosmology (modern physics) the first neutral matter to form was a mixture of hydrogen & helium, which condensed gravitationally to make the first stars. It was only as these early stars neared exhausted their nuclear fuel supply that heavier elements were formed, up to iron. Some of the bigger stars ended their life in...

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Math homework: Logarithms The solution to the equation x -1/2 (exponent) = 5 is . . . When doing math typographically on boards like this, the convention is to use the ^ character (shift-6) to mean 'raised to the power of'. For example, x-squared is written x^2. If the exponent is complicated then enclose it in parentheses. As I understand the problem, the equation to solve is: x^(-1/2) = 5 X^(-1/2) = 1 / x^(1/2) by meaning of negative exponent. and x^(1/2) is the...

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What is defined as any unwanted electrical signals that are induced onto power or signal lines? Noise.

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could i be a werewolf?..because i think i am Werewolves are make-believe. You are not a werewolf.

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can you still have surgery while being pregnant? Oral surgery for extraction of wisdom teeth can be done under local anesthesia, which is safe during pregnancy. General anesthesia or intravenous sedation, however, is not advisable during pregnancy -- especially in the first trimester. Some of the drugs can affect the baby in a bad way (birth defects, etc). In fact it's common for hospitals to do pregnancy tests on women of child-bearing...

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If a band chooses to name itself the same name as a company, could there be legal issues? The band known as Chicago originally called itself Chicago Transit Authority, but the city of Chicago threatened to sue so they shortened the name.

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If a tree falls in the forrest, WHY DOESN'T ANYONE HEAR IT?!?! The old conundrum is, "If a tree falls and no one is around to hear it, does it still make a sound?" The scientific answer, of course, is yes. Philosophically the question is whether reality is based on human experience alone. Your question as written, however, doesn't make a lot of sense.

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Do you forgive a family member who has done you wrong WITHOUT an apology? Why does family get away with doing you wrong (repeatedly)? I hold all people accountable for their actions -- no exceptions for family members. If they can't be decent human beings then I walk away. The door is always open for them to recognize their mistakes & make restitution -- otherwise it's just a sad situation to have to exclude them from my life & move on. Such are the consequences of bad behavior.

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What kind of material is used in mood rings to make them change colors? Liquid crystals. The color is temperature-dependent.

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why do we drool when we sleep? We don't ALL drool in our sleep! But this is common. While asleep you don't respond as readily to the tactile sensation of saliva in your mouth & on your lips, chin, etc. & you don't swallow as often as while you're awake.

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do you bleve in the phase "if it seems too good to be true more than likey it is fake" Yes -- too bad those who invested in the Madoff scheme didn't heed this advice. It's a variation of another proverb: "Extraordinary claims require extraordinary proof."

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a scientist has a sample of magnesium that has a mass of 5 grams. how many atoms of magnesium does the scientist have? Here's the approach: Look up the atomic weight (AW) of magnesium on a periodic table. That many grams equals one mole of magnesium atoms. One mole contains Avogadro's number of atoms (6.02x10^23). So 5 grams divided by the AW of Mg is how many moles are in the sample. Multiply that times Avogadro's number to get the number of atoms.

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What is the name of the weapon used by the "villain" in the film "No Country for Old Men"? It's called a CAPTIVE BOLT PISTOL & works by compressed air, normally used on cattle in slaughterhouses. http://en.wikipedia.org/wiki/Captive_bolt_pistol

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please help. what information does a subscript reveal and how would changing a subscript in a chemical formula change the chemical it reps? The subscript tells how many atoms of that element belong to the molecule. Changing the subscript thus represents a different molecule that might have completely different properties.

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how do atoms jump from ground state to excited state and back? One of the atom's electrons has to absorb enough energy (by any of a number of processes) to jump to a higher energy level. When it returns to the ground state it emits a photon whose wavelength matches the energy difference between the states.

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watch this video but just listen to the music . can any body tell me what is the song called and who sang it Gordon Lightfoot: "If You Could Read My Mind"

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Is it true that insects can sometimes survive a nuclear explosion? Obviously all living things at ground zero will be vaporized. But cockroaches (& perhaps other insects) can withstand a much higher dose of radiation that would be lethal to humans and other higher animals. This finding leads to speculation that a global nuclear holocaust might be survived only by some of these insects.

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Should blacks Take Responsibility for their own actions? after answering please read response comments= AB limited question word characters All adults are responsible for their actions. What's race got to do with it?

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what is an example of matter Matter is anything with mass. So anything made of atoms & molecules is matter. Massless particles, such as photons, are not matter.

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Which old scientist calculated Pi to the infinite power? Your question makes no sense. The nth power of pi would be pi times pi times pi... with a total of n factors of pi. Because pi is greater than 1, as n grows towards infinity the nth power of pi also grows towards infinity. Perhaps you are referring to the fact that pi is an irrational number, and therefore its decimal expansion has an infinite number of digits with no periodically repeating...

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Atheist, do not believe in a higher power that defines wrong as sin but do you believe in right and wrong? If so how do you define the two? I "believe" in the Golden Rule, which distinguishes right from wrong. Moral behavior makes the world a better place to live. Most importantly I am motivated by regard for other people and not by some promise of reward or fear of punishment in an afterlife. The atheist's sense of morality is genuine and innate.

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Holding your breath while scuba diving is a bad idea, why? I'm not a diver, but I know that if you hold your breath while ascending, then the increased pressure difference between lungs & outside of chest may cause fatal air embolism.

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What is soldering bridge? PC tech said he needed to do this to fix a usb device It's when a blob of solder accidentally connects two areas that aren't supposed to be connected -- creating a short circuit.

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Can someone please answer and explain this equation i can't figuire out how to factor it. a^3 - 27 thanks, There's an identity for the difference of cubes: (a^3 - b^3) = (a-b) (a^2 + ab + b^2) Here b=3, so it factors as: (a-3)(a^2 + 3a + 9)

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Does the air breathed out contains carbondioxide gas? Exhaled gas contains about 5% CO2 by volume, as compared to practically zero (0.04% or so) in room air. This is a product of cellular respiration, analogous to CO2 generated during combustion -- burning wood or other organic compounds. Re-breathing exhaled gas (such as in a paper bag) results in falling oxygen levels and rising CO2 levels in blood, both of which are harmful to the body.

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Why are we only looking for alien life on planets similer to Earth? We're not really, but best use of scarce resources (telescope time, work of analysis) dictates ignoring planets that are, say, hot enough to melt lead or cold enough to freeze nitrogen. Life " as we know it " requires moderate, in-between conditions -- the so-called Goldilocks principle. That why we look at planets similar to Earth first. (There really haven't been any yet that closely match...

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Is there only a small window of opportunity a species has to get off their rock? Develop too early.. snuffed by asteroid, too late, by sun. Nobody knows. The only known species that could move to a new home planet would be humans, and we've only been an intelligent species for about 100,000 years, with space technology for less than a century. To use Carl Sagan's great Cosmic Calendar analogy compressing all time into a year http://visav.phys.uvic.ca/~babul/AstroCourses/P303/BB-slide.htm : If the Big Bang occurred on New...

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If the earth were shaded by a cloud of dust because of a meteor strike or one of the doomsday prophecies, will gps units still work? Well, GPS satellites are geosynchronous (they make one oribit in exactly one day), which puts them all about 22,000 miles -- about three Earth diameters -- above the Earth' surface. They operate in microwave / gigahertz bands where the wavelengths are on the order of 20 cm (8 inches) or so. An impact by a large object such as an asteroid or comet would indeed throw up a cloud of dust into...

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why we use only Local C: drive for program files. You mean why is it common? (It's not reqired.) In the early 1980s, when Bill Gates was creating PC-DOS for the IBM PC (later becoming MS-DOS and then Windows), computers usually had two floppy disk drives labeled A: and B:, one of which was the boot drive. Hard drives were added later, with IBM's next model, the PC-XT which booted off the hard drive, which was designated C: Soon C:...

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Can you have a horizontal asymptote without a fraction? The exponential f(x) = e^x has a horizontal asymptote at negative infinity. The question is a little fuzzy because anything can be expressed as a fraction. Simple polynomials of linear degree or higher, however, don't have asymptotes.

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What do you think about that Norway Spiral? What do you think caused it? Share your answer...

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What do you think about that Norway Spiral? What do you think caused it? Rocket, not Santa, blamed for Norway spiral (CNN) -- http://us.cnn.com/2009/WORLD/europe/12/10/norway.ufo.light/index.html It was a Russian missile test that lost stability & went into a spiral, as missiles are known to do under such conditions. The Russian Defense Ministry confirmed that the 3rd stage of a sub-fired missile that day had failed.

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Is there a science to winning the lottery? No. You have to be lucky. The mathematical expectation is less than zero, making the most rational strategy to not buy lottery tickets!

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What type of element would be useful in electrical components? Conductors, insulators, and semi-conductors. Depends on the component.

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Why can’t something traveling at 2 X light speed just get somewhere twice as fast as light even if on arrival, in theory it could then watch itself make that journey, though it would appear to happen in reverse. "...In the case of a hypothetical signal moving faster than light, there would always be some frames in which the signal was received before it was sent, so that the signal could be said to have moved backwards in time." Source: Wikipedia article on tachyons http://en.wikipedia.org/wiki/Tachyon

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What is a KVA in Electrical Terms? Normally VA (volts-amperes) is the same as Watts, so kVA is the same as kilowatts. In the case of motors there's something called power factor that may make VA somewhat different from Watts.

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What is the connection between temperature and kinetic energy? Temperature is a measure of the average kinetic energy of molecules.

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Do stones contain life force energy? There is no such thing as ' life force energy '. So the answer is no.

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Why ideal current source has infinity resistance? I wonder if the resistance is infinity, will the circuit be open? No, the idea is that an ideal current source is not affected by the load resistance placed in series with it. This is the case if the current source has a very high resistance in relation to the load -- ideally 'infinite' but in practice just high compared to the load.

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How many atoms make up a regular glass of water? Let's say an ordinary glass is 8 ounces or 240 ml -- call it 240 grams of water. The molecular weight of H2O is 18 Daltons. So 240 grams = 240 / 18 = 30 moles of water in the glass. But you asked how many ATOMS, which is 3x the number of molecules. So the glass contains 90 moles of atoms. Avogadro's number = 6.02 x 10^23 per mole. The answer is (6.02)(90)(10^23) = 5.42 x...

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The force directed along the ropes of a rope and pulley system is called what Tension.

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How do cfcs relate to ozone cfc's (chlorofluorocarbons) deplete the ozone layer, which is important for filtering ultraviolet radiation from the sun. This is a serious environmental concern but not actually a mechanism for global warming.

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Explain General Relativity in 5 words or less. Gravity equivalent to acceleration.

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What is the probability if rolling 2 dice and coming up with 3, then 4, then 5 in succession With each roll of 2 dice, there are: 2 ways to get 3: 2+1 and 1+2 3 ways to get 4: 1+3, 2+2, and 3+1 4 ways to get 5: 1+4, 2+3, 3+2, and 4+1 Since each roll has 36 possible outcomes all together, the overall probability you ask about is: (2 / 36)*(3 / 36)*(4 / 36) = 24 / 46656 = 1 / 1944 = 0.05% (rounded off)

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Why do the window panes of motor cars get covered with moist air when doors and windows are closed? The air inside the car is moist from occupants' exhaled breath, which is saturated with water vapor. This moisture condenses on the inside the glass, which is relatively cold & below the dew point. Warming the glass reverses the process.

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Why does nearly every object in the solar sysyem both spin(rotate,turn) to the east as well as orbit (move,revolve) around the sun to the east( counterclockwise)? what other characteristics of the soalr system is explained by this? The basic principle is conservation of angular momentum. So once the disk of gas begins accretion into a solar system, it spins one way or the other & all objects tend to revolve & rotate with the angular momentum vector pointing in the same direction. Tilted or retrograde rotation is the exception rather than the rule. If you look at all objects in the universe, their rotational...

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How is ammonia gas made in the laboratory? How is it made commercially? Of what use is it? This outline looks promising: http://en.wikipedia.org/wiki/Ammonia * 1 Structure and basic chemical properties * 2 History * 3 Synthesis and production * 4 Biosynthesis * 5 Properties * 6 Interstellar formation and destruction * 7 Uses o 7.1 Fertilizer o 7.2 Precursor to nitrogenous compounds o 7.3 Cleaner o 7.4...

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Four plus four minus 3,99999999999999999999? Do the 9's go on forever? If so the answer is exactly 4. Otherwise it's 4.00000000000000000001

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Why do all laptop speakers suck so bad? It's their small size. The diameter of the speaker's driving element determines the lowest frequency it can efficiently produce. The smaller the 'tinnier'.

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What is the difference between animal hair and fur? From the ever-dependable Wikipedia: Fur is a synonym for hair, used more commonly in reference to non-human animals, usually mammals; particularly those with extensive body hair coverage. The term is sometimes used to refer to the body hair of an animal as a complete coat, also known as the "pelage". Fur is also used to refer to animal pelts which have been processed into...

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Is twat a valid entry in scrabble? There's an official word list (OWL) used for tournament play in Scrabble -- it includes all the offensive words (including TWAT) normally excluded from the Official Scrabble Player's Dictionary & other 'family' word lists.

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What is the hologram theory? You're probably referring to the Holographic Principle or Holographic Universe, related to string theory. A better explanation than anything I can offer may be found here: http://en.wikipedia.org/wiki/Holographic_universe

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When the sun is in it's death throes and expands, would the Earth be pushed away as it expands, be engulfed by the sun, or would the sun's increased grav. pull suck the Earth into it? I remember reading that Earth would initially get pushed to a farther orbit, but eventually still be engulfed by the red giant sun.

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What is the best vision you can have? "Normal" vision is 20/20 but some people can see 20/15 or 20/10. That means they can see details at 20 feet that most people can only see from 15 or 10 feet away.

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In this sentence...."every friday at one o clock pm the computer support team meets to review the problems that occured during the previous week." What needs to be capitalized in this sentence? Every -- start of sentence Friday -- day of week Computer Support Team -- if it's an official name; if merely descriptive of a group of people it doesn't get capitalized

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The ripples in a certain groove 10.8 cm from the center of a 33-rpm phonograph record have a wavelength of 1.70 mm. What will be the frequency of the sound emitted? (Frequency) = (Speed of wave) / (Wavelength) You're given the wavelength. You have to calculate the speed, then find frequency from formula above. The circumference of the groove is 2*pi*radius and the radius is given. 33 rpm means the record spins 33 times per minute = 33 circumferences per minute. Convert this to millimeters per second so you can use the formula above. Hope that...

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Is that possible to build a time machine Probably not. There are exotic cosmological theories that allow it in principle, but most physicists believe travel into the past is impossible because it violates causality. Travel at close to light speed would allow humans to return to earth far in the future (the Twin Paradox). But they couldn't go back again.

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There two identical heavy springs, one foot each when un-stretched. When one spring is suspended from the ceiling it enlongates under its own weight to 2 feet. How long are two spings suspended from the ceiling in series? 6 feet. I like Q's analytic approach but I resorted to -- er, found -- a more elementary approach by considering the midpoint of a single spring. Assuming Hooke's Law linearity the midpoint is displaced from 6 inches to 1 foot under the weight of the lower half of the spring. Adding another spring in series, this midpoint is now pulled down by 1-1/2 springs = 3 times the original...

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What animal have you seen worring about the past or future? Only humans are capable of that kind of thought.

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From today's year, what is 4 score and 7 years ago? 2009 - 87 = 1922 Howard Carter enters King Tut's tomb (sealed for 3000 years)...Eskimo Pie patented...first issue of Readers Digest...President Harding puts first radio in White House...Nosferatu in theaters...original Yankee Stadium under construction...Hollywood Bowl opens...BBC is formed...Egypt gains independence from U.K...first aircraft carrier (Langley) commissioned...Lincoln...

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What is the science behind carbon footprints? (Need to know now, it's for homework.) Click your heels together 3 times & follow one of these links... http://en.wikipedia.org/wiki/Carbon_footprint http://science.howstuffworks.com/carbon-footprint1.htm http://timeforchange.org/what-is-a-carbon-footprint-definition

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How is chemistry related to other sciences? Chemistry is a physical science that in essence is a branch of physics -- dealing with electromagnetic interactions (chemical bonds) between atoms. Since living organisms depend on chemical reactions to drive biological processes, one might view all biological sciences as based on chemistry. Earth sciences are also largely based on chemistry (including physical chem).

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Oh I would anything,if it weren't for____(fill in the blank) There's a word missing between 'would' & 'anything' so I can't fill in the blank -- that's the first thing that comes to mind.

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Will an opened 2-litre bottle of pop (with the cap screwed back on) retain more of its carbonation upright or on its side? In theory it will retain fizz better upright, because of the smaller surface area of the gas-liquid interface. Better still, squeeze most of the air out of the bottle before replacing the cap -- then the CO2 has nowhere to go & stays in solution.

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If we can see galaxies and things millions of light years away, why is it so difficult for us to look at Pluto? Because it is very, very small and dim.

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In what proportion does the height of 3-4-5 right triangle divide its hypotenuse? 9:16

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What is mean by chip? Permit me to restate question in standard English: "What is meant by chip?" or "What does chip mean?" In electronics a chip is an integrated circuit (IC) that puts more than one transistor on a single piece of silicon, along with other circuit elements & interconnections. Each transistor is microscopic so the entire IC is small as well, though it might be packaged...

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Radio waves travel at the speed of light (3 E8 m.s). What is the wavelength for an FM broadcast at 94.8Mhz? The relevant formula is: wavelength = (speed of wave) / (frequency) Wavelength (meters) = (3x10^8 meters/sec) / (9.48x10^7 sec^-1) I use sec^-1 to mean ' per second ' Use a calculator & mind the powers of 10. The formula gives the answer in units of meters (time cancels out). Fwiw this frequency is not broadcast in the U.S. (it would have to be 94.7 or 94.9).

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What do you think next step of human evolution will be? For humans I think evolution is over. Present-day medical science and biotechnology make natural selection obsolete. Disease, deformity, and fertility problems are all of limited impact, reproduction-wise. We more-or-less control our destiny as a species in a way that goes way beyond Darwinism. We have (or soon will have within a century or so) the power to direct our own evolution in a...

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Is there a way to destroy an RFID chip? Would a microwave or a small EMP pluse destroy them? From RFID Journal (not necessarily a peer-reviewed scientific journal) comes this article: http://www.rfidjournal.com/article/articleview/2098/1/1/ Excerpt : -------------- RFID-Zapper Shoots to Kill Two students turned a disposable camera into a gadget that shocks the life out of RFID tags; now, a privacy advocacy group hopes to sell devices based on their design. ...The young...

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If you throw a baseball 80/mph from the bed of a truck moving in the same direction at 100/mph, how fast will the baseball be moving as seen by an observer on the side of the road? The classical answer is 180 mph -- the speeds being additive. But since you posted this under the category of RELATIVITY it appears that a more refined calculation is in order. The relativistic formula is (u + v) / (1 + uv/c^2) where u & v are the velocities to be added & c is speed of light. Taking the speed of light to be 670,616,629 miles per hour, this gives 180 / (1 +...

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When you go to the dentist and have N2O2 ..what chemically happens to make you feel that way? The general anesthetic nitrous oxide has chemical formula N2O. Not to be confused with nitric oxide (NO) or nitrogen dioxide (NO2) or other oxides of nitrogen (NOx). The short answer to your question is: Nobody knows. Despite the fact that it's used on millions of people every day, and is predictable and controllable with the right equipment, the exact mechanism is not understood. ...

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I think that whn a guy shakes his penis when he finishes peeing,,the pee watter sticks to the lower part of his glans and he cant shake it off because evolution says when intercourse happens man needs a lubrication pocket so it's less painful and easy? Lubrication in anticipation of sexual intercourse is provided by secretions of the bulbourethral glands -- so-called pre-cum, which is indeed most likely an evolutionary adaptation. Urine has nothing to do with it.

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How can time slow down near the speed of light if all movement is relative to the observer? The answer is in your question! Clocks tick more slowly when moving relative to those of a stationary observer. This has been demonstrated by many experiments, such as the decay of mesons traveling at relativistic velocities, or by comparing two atomic clocks one that stays home & the other that travels in an airplane. The basic idea of relativity is that time & space are not...

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Write any two properties of the image of the mirror that is used in the house. 1. Reflected 2. Virtual

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Which of the following can be seen through a compound light microscope-- A water molecule, A hydrogen bond, A DNA molecule, or A Golgi Apparatus? Golgi apparatus. The resolution of light microscopes is around 1 micrometer -- you can barely make out small bacteria. Atoms & molecules are 1000 times smaller.

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In order to sustain life on the moon could you build massive glass domes with tree plantations inside for oxygen? Max points for a good question. But there was an experiment called Biosphere 2 in the early 1990s -- they had about 4 acres under airtight glass in the Arizona desert. A small group of researchers lived inside the enclosure for 2 year recycling water, trash, sewage, etc. There was an agricultural area & multiple ecosystems represented such as rain forest, savanna, and saltwater...

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What do you think birds think about? Tweeting.

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Is there a special term for a complex number in which the real part and the imaginary part are the same? I don't think there's any special name for complex numbers such as 3+3i or 19+19i. They will lie on a line at 45 degrees between the real & imaginary axes.

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Whats the medial bone of the forearm in anatomical position? The ulna. In anatomical position the palms of the hand face forward.

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Which of the following are orthogonal pairs a) 3i+2j b) i+j c) 2i-3j d) 7i+j a & c are orthogonal to each other.

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What are the broad categories of anesthesia? General anesthesia Regional anesthesia Local anesthesia

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(logical answer.) Why can't people that have been dead for more than 24 hours come back to life? Every single cell in the body relies on the flow of blood through capillaries to furnish oxygen & nutrients. Once circulation ceases, it only takes brain cells 5 or 6 minutes to die & other critical organs like heart & kidneys a few more minutes. Within an hour or 2 virtually every cell is dead -- the last ones to go being avascular connective tissue like tendons & ligaments --...

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How do you enter a parallel universe? Go to the Bermuda Triangle, take a left at the end of the rainbow, traverse the Twilight Zone, and go down the rabbit hole...

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If you puch a couple of holes in the bottom of a water filled container,water will spurt out because of water pressure. Now drop the container, and, as it freely falls, note that the water no longer spurts out! how do you explain this? The water pressure drops to zero when the container enters free-fall. There's no force to generate pressure.

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I need math tricks. help! Then there's the fact that (x+1)(x-1) = x^2 - 1 Example: How much is 51 x 49 ? Easy. It's 50^2 - 1 = 2500-1 = 2499.

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A diagram shows two dimentions, the container dimensions are, 5cm 20 cm and 12cm the freezer draw has dimentions,0.2 0.4 and 0.5 what is the maximum number of containers that will fit into the draw? could you please show me how to work it out, (2009-1 Each container has a volume of (20 x 12 x 5) = 1200 cm^3 The freezer drawer has a volume (assuming those figures are meters) of (50 x 40 x 20) = 40,000 So (dividing container by object) you can at least get an upper limit of how many containers will fit in the drawer: 40,000 / 1200 = 33.3; rounding down gives a limit of 33. Exactly how to pack them maximally is the tricky part. This is...

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How do LED lights change color? A single light-emitting diode (LED) is only capable of emitting a single wavelength of light. Like all diodes an LED conducts current in one direction but not the other. It acts as either a short circuit (emitting light) or an open circuit (doing nothing), depending on whether the voltage is positive or negative. A so-called bipolar LED puts a green LED and a red LED together, but in...

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Water?? it expands when frozen....What happens to water when it cant expand? Can we harness this energy? Water? Water is well known for rupturing metal pipes as it expands during freezing. Some of that work could be harnessed by clever engineering. But how are you going to freeze water? Run a compressor? If it takes energy to lower the temperature then you'll never come close to getting out of it what you put into it. You could move the water-filled device to a colder region (polar,...

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How does a duck's bill help it eat? Why isn't pointed like a chicken's beak? Ducks scoop stuff at the surface of water. Chickens peck at small grains on dry ground. Their beaks have adapted (through natural selection) to their needs.

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How can i make a motor turn a sprocket? Motors usually turn at high rpm's. Sprockets usually turn at low rpm's. You need a gearbox (or other mechanical system) to reduce the motor speed while multiplying its torque.

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Can an individual plant become immortal by having cuttings taken from it then cuttings taken from the cuttings etc.etc? Yes, in principle. The cuttings are clones.

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What is the most mysterious thing on planet Earth? The biggest scientific mystery: Abiogenesis -- the process by which living cells emerged over about a billion years from inorganic precursors. We have plausible hypotheses but meager evidence. Cosmological mysteries are even more fundamental -- the big bang & structure of universe -- but you asked about planet Earth.

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What is the difference between a ton and tonne? In the U.S. and Canada a TON is 2000 pounds. This measure is also known as a SHORT TON. In countries that use the metric system, a TONNE is 1000 kilograms, which makes it 2204.62 pounds. This measure is also known as a METRIC TON. England has its own peculiar system based on a LONG TON. http://en.wikipedia.org/wiki/Ton#Units_of_mass

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What are the parts of the atom? A small nucleus in the center, surrounded by electrons which form 'clouds' or 'shells' around the nucleus, bound by the electromagnetic force. The nucleus is composed of protons & neutrons, each of which in turn is composed of 3 quarks, all bound together by the strong nuclear force.

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Is anyone working to produce a self fueling device? If by 'self-fueling' you mean that the device makes its own fuel, then no. That would violate laws of thermodynamics which are known to be highly reliable.

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Lauren says, “I’m halfway through reading my book. If I read another 84 pages, I’ll be 2/3 of the way through my book.” How many pages are in Lauren’s book? 504 pages. Halfway through = 3/6 of the pages. 2/3 of the way through = 4/6 of the pages. So 'another 84 pages' represents 1/6 of the book. The book therefore has 84*6 = 504 pages.

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Did humans hunt mammoths to extinction? < posting error >

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Now that we found water on the moon, can you imagine swimming pools there? What would it be like to swim in 1/5 gravity? You're more likely to drown in 1/6 gravity -- your buoyancy is reduced by the same factor, so you won't ascend as readily from deep water. That aside, it's probably exhilarating!

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Who invented the electric toaster? "It is unknown who invented the first electric bread toaster." http://en.wikipedia.org/wiki/Toaster#History

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If you work to save the polar bears are you a seal hater? "Seal hater, alligator"

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There are eye muscles that make us near- or far-sighted. Are there eye muscles that make us astigmatic? Being near-sighted or far-sighted isn't related to eye muscles. It has to do with the curvature of the cornea (the clear outer 'window') and the size of the eyeball, which both determine whether the image focuses in front of or behind the retina (the image sensor). In ordinary near- or far-sightedness, the error (and lenses to correct it) is said to be spherical. In...

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What is the fastest elevator you've been on? John Hancock Building (100 stories) in Chicago.

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Write an infinite geometric sequence where the first term is one and the ratio is 1 percent. 1, .01, .0001, .000001, ... The ratio is 1% = 0.01

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A rhombus is a square always true sometimes true never true? It's only sometimes true. A rhombus doesn't have to have right angles. Always true: A square is a (type of) rhombus.

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Would a solar panel located on the Moon charge sooner than same panel on Earth? Yes. The sun is about the same distance but there's no atmosphere to absorb any of the photons headed for the panel.

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Calculate the integral (3) ∫ (1) [(1-3x^2) / (x^2)] dx (the ∫ is from 1 to 3) I'm extremely lost in my calculus class, this question is from my practice test! Please help and explain work! Thank you so much! f(x) = (1 - 3x^2) / (x^2) f(x) = (1/ x^2) - 3 = (x^-2) - 3 Looking easier already. You should know that the integral is the anti-derivative, and the integral of a sum/difference equals the sum/difference of the integral. The anti-derivative of x^-2 is -(1/x) (power of x rule) The anti-derivative of 3 is 3x can you take it from there?

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A helium-filled balloon is tied to a 2.90 m long, 0.0506 kg uniform string. The balloon is spherical with a radius of 0.398 m. When released, it lifts a length h of string and then remains in equilibrium. Determine the value of h. The envelope of the ball Your complete question is cut off. But it sounds like you have to calculate the upward force exerted by the balloon's buoyancy and then calculate how much string is needed to provide an equal and opposite weight. 2.9 m of a uniform string weighs 50.6 grams, so it's (50.6)/(2.9) = 17.45 grams per meter. Finding the buoyancy of the balloon is going to be harder, involving the...

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Im making a science fair project, how would make a cheaper quake table? Borrow somebody's electric massage device & bolt it to a sheet of wood. Or something like that.

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How long is a nanosecond? One billionth of a second. 10^-9 second. One millionth of a millisecond. One thousandth of a microsecond. Light travels about one foot per nanosecond.

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Is cancer cell growth suspended in space? No. Lack of gravity makes no difference.

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Can someone explain Chaos Theory in simple terms? It deals with non-linear systems -- which describes much of the world. Although in principle you could apply simple laws of physics to calculate the system's future behavior, those equations turn out to be so complex that even a small, seemingly insignificant change in initial conditions will lead to a wildly different solution. The result is that many real-world systems behave...

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What are the odds of having five sons in a row, what percentage? About 3% (1/32) chance for 5 boys in a row & 3% chance for 5 girls in a row. The odds are 31:1 against.

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What's your best Scrabble score ever? 572.

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N R A I T C O M clue:if u like someone u will never forget this word ROMANTIC.

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I am in the 9th grade and I am taking honors earth science. I need to come up with a science project in which isn't already known, and it needs to have a benefit to society. It needs to have a hypothesis, IV, DV, and a control group. Ideas please? A "benefit to society that isn't already known"? That's a pretty tall order for a 9th grade science project! Plenty of ideas online. It's all about how carefully you think things through.

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Can someone define the tip-to-tail method in physics? Vector addition. If you represent two vectors as arrows with tails at the origin, their sum is found by moving one arrow (without changing length or direction) so its tail coincides with the other's tip. The sum vector goes from the origin to this arrow's tip. Also known as the parallelogram rule.

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Are Buckeyball structures easy to build(2009-11-14) They form spontaneously in soot from flames.

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Just because life on earth needs water to survive, who's to say other intelligent life in the universe needs it? Carbon is unique in the periodic table of elements because of its huge number of bonding arrangements with other atoms. Organic chemistry is the basis of life's complexity. The chemical reactions among these molecules -- what we call metabolism -- take place in aqueous solution in living cells. Water is the 'universal solvent' because water molecules have unique properties --...

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If artificial intelligence does something is it automated? Not necessarily. AI might be used to answer questions put to it manually, or to make models for brain research. Automation, on the other hand, can be easily done with 'dumb' electronics like my wristwatch updating its 7-segment display each second.

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If s is the sum of 8,6,4,2 and x ,what must be the value of x for x to equal 1/5 of s. If x is 1/5 of s, then the other numbers 8, 6, 4, & 2 must be 4/5 of s. 8+6+4+2 = 20 20 is 4/5 of what? That gives you s. Then subtract 20 to get x.

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What would happen if a interceptor,intercept a nuke missile?will it explode? My understanding is that nuclear warheads must be detonated exactly as designed so that *critical mass* for a nuclear chain reaction is obtained, releasing nuclear energy. An interceptor might detonate conventional explosives to destroy the weapon (which itself contains very carefully arranged conventional explosives for triggering) but the nuclear part won't happen if it's just...

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If you had 2 lorries rolling down a hill, the weight of 1 was 10 ton and the other was 20 ton. would they travel at the same speed, and would the 20 ton lorry do twice the damage if they hit a wall ?. Yes, they would roll at the same speed (ignoring rolling friction & air resistance); weight is proportional to mass whether standing, rolling down an incline, or in free-fall. One lorry has twice the momentum and twice the kinetic energy of the other, so presumably will do more damage. Energy and momentum transfer depend on the details of the wall. "Twice the damage" might be...

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Would shadows be completely black in outer space, where there is no atmosphere to scatter light? Why, or why not? A. Yes, because there is no scattering of light. B. Yes, because light diffracts around the edge of the object casting the shadow If the light is a point source a great distance away, the shadows should be nearly black & white with small diffraction effects at edges, less so for larger objects. If the light source is the sun at roughly the same distance it is from Earth, then you have to take into account the width of the sun's disk (about 1/2 a degree) which will soften shadows a bit.

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What does the wave structure/shape of white light look like from all the frequencies/wavelengths as a result of interference (another wavelength, a flat line?) It's white noise. Looks like this: http://en.wikipedia.org/wiki/File:White-noise.png Usually thought of as sound waves, but it's named for white light. Btw, destructive interference doesn't usually produce flatlines because of phase shifts -- there's no coherence.

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Do you think we really originated on earth or did we come from some other planet a long time ago? It's pretty clear (scientifically speaking) that all living things on Earth are descended from a common single-celled ancestor. The more prickly question is how living cells arose from inorganic matter. This is abiogenesis, for which there are plausible hypotheses but little evidence. As with evolution, the key ingredient is deep time. The Earth is 4.5 byo & evidence for life goes...

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Is everything in this world basically organic. Organic means carbon-based. So the term applies to all living things on Earth. Rocks are not organic -- and that includes all manufactured products derived from rocks: metal, glass, ceramic, etc. Most plastics are organic (derived from petroleum, which is derived from decomposed living things).

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I am reading a magazine. I read a word and at that exact moment hear that word on the radio or tv. What is this called? A coincidence. In my experience it's unusual but not rare -- no reason to call a press conference to proclaim a paranormal phenomenon.

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Does anybody know how to calculate the inverse trigonometric functions? I'm looking for an actual formula, nothing I've found has been explained very well, and some don't even work. Wikipedia has a useful article on inverse trig functions, giving some infinite series formulas: http://en.wikipedia.org/wiki/Inverse_trigonometric_functions#Infinite_series In practical terms the key question for actual computation is how quickly these series converge, which I don't know.

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What is the 'Al' in Al Capone short for? Alphonse.

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You have tiles that measure 4" by 5". What is the smallest square region you can cover without cutting or overlapping the tiles? You didn't rule out a square hole. In that case you can arrange just 4 of the tiles to cover a 9x9 square (81 sq inches) with one central square inch not covered. Otherwise I think you'd need 4 rows of 5 tiles (20 in all).

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I calculated the force of a bullet which hits a target and exits the target with a lower velocity to be 26000 N using the impulse-momentum theory. Is this right or is it too large? Are bullets really that powerful? That's almost 3 tons -- but only for a very brief instant of impulse duration. Bullets carry an enormous kinetic energy & appreciable momentum -- several grams traveling at supersonic speed.

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What is the value of 9@7? @ is not an operation between numbers that I recognize.

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What do you call the small brown Archaeologists book which they draw in? the one that was in the Indiana Jones movie about the Holy Grail? A journal, I suppose.

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The energy required to dislodge electrons from sodium metal via the photoelectric effect is 275 kJ/mol. What wavelength in nm of light has sufficient energy per photon to dislodge an electron from the surface of sodium? Using this joules-to-electron-volts (J to eV) calculator: http://www.unitconversion.org/energy/joules-to-electron-volts-conversion.html 275 kilo-joules = 1.71641425 e+24 eV Divide by Avogadro's number 6.02 e+23, giving 2.86 eV Using another calculator for photon energy: http://pvcdrom.pveducation.org/SUNLIGHT/PENERGY.HTM it's between 433 & 434 nanometers -- "indigo"

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A ladder leans against a wall. The top of the ladder is 8 feet above the ground. If the bottom of the ladder is then moved 2 feet farther from the wall, the ladder will lie on the ground with its top touching the wall. How long is the ladder? If the ladder is x feet long then it's bottom is x-2 feet from the wall, while its top is 8 feet up the wall. The ladder is a hypotenuse. Pythagoras says: 8^2 + (x-2)^2 = x^2 which reduces to 4x = 64 + 4 = 68 x = 68/4 = 17 The problem is based on the Pythagorean triple (8, 15, 17)

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What is the importance of the oxygen produced during the light-dependent reactions? It enters the atmosphere & becomes available to oxygen-breathing organisms.

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How long is a sperm cell? In male humans, sperm cells consists of a head 5 µm by 3 µm and a tail 50 µm long. http://en.wikipedia.org/wiki/Spermatozoon

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What are these? http://i394.photobucket.com/albums/pp26/movinginstereo/0000WeirdScience-00.jpg http://i394.photobucket.com/albums/pp26/movinginstereo/0000WeirdScience-00.jpg Looks like the rear of a cabinet containing one very long loop of tubing, folded many times to maximize length within the volume of the cabinet. If the tubes are metal then I'd say it's part of a heat exchanger. If the tubes are glass I'd say it's some kind of humongous fluorescent lamp /...

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Can anybody explain clearly how to find the factorial of a non-integer number? Use the gamma ( Γ ) function, which gives factorials for all real & complex numbers except zero and negative integers. (By convention, however, 0! = 1) http://en.wikipedia.org/wiki/Gamma_function http://mathworld.wolfram.com/GammaFunction.html

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Jews are still waiting for a Messiah from God to save them. So what happens to them meanwhile? Do they have to do everything themselves? And are they going to hell after this? In a Christian view known as supersessionism, the Jews get it in the end. http://www.theopedia.com/Supersessionism

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A farmer has four straight segments of fence of lengths 60,70,90 and100 feet, which cannot be cut or bent. The farmer wants to fence off the largest possible area. How? I don't have an exact solution or proof. But fiddling around a little -- using 6, 7, 9 & 10 as lengths -- I can see that if the long sides were perpendicular their diagonal would be sqrt(181) = 13.45... which is a little bigger than the sum of the two short sides. So I'm going to go out on a thin intuitive limb here and guess that the solution is to make the short sides (60...

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The sum of all 12 edges of a brick is 120, and total surface area of the brick is 539. How long is spacial diagonal of the brick? Answer: 19 Solution: Let x, y, and z be the dimensions of the brick, which is a rectangular parallelopiped. The sum of all 12 edges is 4(x + y + z) = 120 so (x + y + z) = 30 The surface area is 2(xy + xz + yz) = 539 The problem is to find the long diagonal D, which is the square root of D^2 = (x^2 + y^2 + z^2) Now here's the bit of insight that arrived in my brain as I was...

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Do alpha particles tend to grab free electrons if they come across them? Alpha particles are considered ionizing radiation. They have so much kinetic energy that they easily knock electrons loose from atoms in their path. It only takes 2 electrons to actually neutralize its +2 charge to make helium gas.

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Do you beleive that IF there was a higher being, they placed evolutionism for us non beleivers? And if they did such a thing, why would they care if we beleived in it or not? Some young-earth biblical literalists maintain that Darwinism is supported by phony physical evidence deliberately planted by god to test their faith. A fairly cynical and fanatical view imo. The simplest explanation is that the apparent physical evidence is, in fact, real physical evidence that validates evolution. The presence of an invisible deity, somehow pulling the strings in the...

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The Charges in sodium chloride are all balanced for every positive sodium ion there is a corresponding negative chloride ion. Since its charges are balanced, how can sodium chloride be attracted to water, and vice versa? Watch this short video: http://wps.prenhall.com/wps/media/objects/167/171787/DissolutionofNaClinWater.html Being polar, water molecules tend to cluster around the sodium & chlorine atoms. Interactions of Na and Cl with water molecules overcome their mutual interactions within the crystal lattice. Hence solubility.

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What is the difference between the articular fossa and teh glenoid fossa? In anatomy a fossa is a depression or pit. There are actually *two* glenoid fossas in the skeleton, in both cases where one bone articulates with another. Thus they are both articular fossas. (1) In the temporal bone of the skull, where the mandible (jawbone) articulates as a hinge. (2) In the shoulder blade (scapula) where the upper arm bone (humerus) articulates as a ball & socket.

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How do i solve 36y^2-84-147 using factoring trinomials? The trinomial factors into binomials as follows: 36y^2 - 84y - 147 = (6y - 7)*(6y + 21)

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Why is gelatin liquefied in the presence of gelatinase Gelatinase is an enzyme that acts as a catalyst to speed the chemical reactions that break down gelatin. Without gelatinase it would take forever.

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Unscramble these letters into two words, which are 6 and 3 letters long. The letters are: PELRHEERA Using anagramming software at http://www.wordsmith.org/anagram/ (avanced search lets you set 2 words max) the ones that match 6-3 or 3-6 are: Healer Per Healer Rep Repeal Her Leaper Her Realer Hep Are Helper Ear Helper Era Helper Rah Peeler Of these phrases, the ones that make the most sense are "Healer Rep" (a health care salesman?) and "Ear Helper" (an...

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How much KW does a car have if it is moving 100 m/s and has a mass of 1000 kg? Answer in joules 1 Joule = 1 Kg-m/sec^2 Kinetic energy = KE = (1/2)*(mass)*(velocity)^2 Here m = 1000 and v = 100 So KE = (1/2)(10^3)(10^4) = 5x10^6 joules (5 million)

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Since there is no geographical name for the intersection of the Prime Meridian and the Equator, I here by proclaim it the Great Prime Equatoridian Divide. Should AB get a boat and have a cruise to that spot to sink an AB flag to claim it? First, let's get a corporate sponsor to pay for it!

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How heavy is a single bacterium? OK, I'm not going to google this. Ballpark calculation: Bacteria are typically one micron in diameter -- at the optical limit of light microscopes. Let's model it as a one-micron cube. Micron = micrometer. 1 micrometer = 10^-6 meters = 10^-4 centimeters 1 cubic micrometer = (10^-4)^3 = 10^-12 cubic centimeters. Pure water has a density of 1 gram per cubic centimeter. Pure...

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Is it true that 68% of all statistics are made up right on the spot? And the other 32% are fabricated. But then no generalizations are true.

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In a computer network, digital signals are transmitted using 'bits' that each last 0.5 microseconds. The bits of a signal are transmitted once every 4 microseconds. Explain why the network cold carry eight signals at one time. As I understand the question, the bit rate is 250 kHz. The 0.5 microsec width is irrelevant (unless PWM encoding is happening). Using the Nyquist rule, the maximum bandwidth is 125 kHz. Divided into 8 pieces gives 15.625 kHz for each channel. Without compression this is enough for good audio or poor video, not much better than dial-up internet connections.

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Why do metals conduct electricity esaily Because of their relatively high atomic numbers they have an abundance of loosely bound valence electrons, which are therefore mobile enough to easily conduct.

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Do you sometimes want to throw the alarm clock out of the bedroom window first thing of a morning? Yes, I want to see time fly.

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The what of cells increases faster than its what so cells must divide instead of continuing to grow larger in order to be able to exchange materials with its what? volume...surface area...exterior environment

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Are you smart enough to answer this question in binary? Or, do you have to use the reference URL? You forgot to mention that it's a text-to-ASCII translation and you didn't separate the individual byte characters by spaces. Otherwise it's just meaningless binary. "It's not like riding a bike."

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Are there more prime numbers than composite numbers? Once you count past 10 the number of primes is less than half the total number. This implies that composites outnumber the primes. Although prime numbers go on without limit, they becomes increasingly 'thinned out' -- the density of primes decreases as numbers get larger. There's a huge body of work on this. When you ask about which of two infinite sets contains...

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How many snooker balls may be placed around another snooker ball of same size, so that all balls touch the one in center? Ah, the 'kissing number' http://mathworld.wolfram.com/KissingNumber.html for identical spheres. That would be 12, not counting the central one.

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What family are the raccoons part of? feline, canine, or bear? lol idk.. ask my fiancee... he wants to know.. help us plz The mammals (a class of vertebrates) are subdivided into orders, one of which is carnivores. Carnivores are subdivided into families (dogs, cats, bears, pinnipeds, etc.) One of these families (actually superfamily) is Musteloidea, which includes weasels, skunks, and raccoons.

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750 Watts, is 750 Joules/second. So time is an intrinsic part of Watts. But how do you measure the wattage output of a 6 amp motor for 10 hours Watts = power Joules = energy Power is the flow of energy -- energy per unit time (1 Watt = 1 Joule/Second) Total electrical energy (what your electric company bills you for) is measured by multiplying power x time. 1 Joule = 1 Watt-Second A 1 kilowatt appliance uses energy at the rate of 1 kilowatt-hour per hour. Hope the above helps clear things up. The motor''s power is P...

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In terms of quantum mechanics, is the following statement accurate? "Matter is solid because probability patterns are difficult to compress." The electrons in matter are described by quantum wave functions, which indeed represent 'probability patterns' of their locations. That doesn't explain why they're difficult to compress. It's because electrons repel other electrons (like charges repel, unlike charges attract). This electromagnetic interaction between electron particles, plus the property that no...

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Are there any invertebrates that you would eat? Shrimp & lobster.

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Why is it that when a car's wheels are moving fast enough, it appears as though they're moving backward? Only in movies or videos. It's a stroboscopic effect, where the discrete frame rate (24 fps for movies, 30 fps for most video) is almost in synch (slightly faster / slower) with the wheel or its spokes, which gives the illusion of slow backward / forward motion. Direct vision does not produce this effect -- above a certain speed fast-moving or spinning objects simply become a blur. ...

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How do you graph f(x) = -3 It's a horizontal line parallel to and 3 units below the x-axis. For all values of x, y = f(x) = -3 All functions whose equation is of the form f(x) = constant will look like this.

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What Does Cryptozoololgy Mean? The study of legendary animals (such as Bigfoot, Loch Ness monster, unicorns, etc.) whose existence is controversial because of lack of evidence. 'Crypto-' literally means 'hidden'.

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Can diamond burn and what happen when we will keep it in microwave at different temperature Yes, diamond can burn, especially at high temperature in an oxygen-rich atmosphere. In 1813 Humphrey Davey used a lens to concentrate the sun's rays as a heat source to ignite diamond, and showed that the product of combustion was CO2, suggesting that diamonds were made of carbon. Diamonds can't get hot enough in a microwave oven to burn.

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Is a day always exactly 24 hours long? We define a day to be 24 hours. This past Saturday, when my locality went off daylight savings time, the day lasted 25 hours. In 6 months there will be a day lasting 23 hours. Every few years a leap second is added, making the day 24 hours plus one second long.

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What is misunderstood about Zombies? That they are entirely fictional!

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Every convergent sequence is bounded is the converse is true?justify No. For example, the sequence 1, -1, 1, -1... has successive sums of 1, 0, 1, 0... It is bounded between 0 and 1 inclusively, but never converges.

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A 72-year-old runner set a age-class record in the 1500-m race with a time of 5 minutes 6 seconds. At this speed, how long would it take him to run 100 m? Convert the time to seconds and then set up a proportion to find your answer. Start with the fact that there are 60 seconds in a minute. 5 min 6 secs = 5x60 + 6 = 306 seconds. If X is the unknown time to run 100 m, then the proportions are: X : 306 = 100 : 1500 (answer: 20.4 seconds)

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An equilateral triangle is inscribed in a circle with a radius of 6". Find the area of the segment cut off by one side of the triangle. Find the area of the circle and the area of triangle. The difference between the two represents the total area of 3 crescent-shaped segments, each of which is 1/3 of this. The circle's radius is 6. The triangle's altitude is 12. You can do the rest.

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What is the tendency of matter to continue in its current state of motion? Newton's First Law of Motion. It establishes uniform linear motion as default behavior in any inertial frame in which there are no forces acting.

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Is kinetic energy indirectly proportional the velocity of the object 'Indirectly proportional' makes no sense. Perhaps you mean 'inversely proportional' -- that would make sense but be wrong! Kinetic energy is directly proportional to the square of the object's velocity. The formula is KE = 1/2 x M x V^2 where M is mass and V is velocity (scalar magnitude)

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All wastes, raw materials, and sources of energy for a cell must enter and leave the cell by passing through the plasma membrane? Correctamundo. I can't think of any exceptions.

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If you were in a life or death situation would you resort to Cannibalism in order to survive? I would distinguish two different scenarios: (1) Eating the flesh of a person who has just died, despite efforts to save him/her. (2) Murdering somebody (by myself or acting in a group) to eat them. I would consider #1 if I believed that I would otherwise starve to death. I would not consider #2 even if believed that I would otherwise starve to death. Call it 'weak' and...

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If the universe is expanding, what is it expanding into? Space itself is what's expanding. There is nothing beyond -- the universe is 'finite but unbounded'. And expanding. The simplest model of our 3-dimensional space is the surface a 4-dimensional hypersphere. [addendum] There's a useful old analogy where bugs are confined to crawl on a 2-dimensional surface. One day their astronomers* discover that distant bug galaxies are...

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Why are compressed gas conisters not always hot? They might be hot right after filling, due to work of compression. But they end up at the temperature of their surroundings (thermal equilibrium) like everything else.

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What are the effects of moon phases The tides tend to be bigger in full moon and new moon than the quarter phases. It's well known that the moon exerts a tidal effect on the Earth. The Sun also exerts a tidal effect about half the magnitude of the moon's. At full and new moons, when the earth, moon, & sun are more or less aligned, these forces are aligned rather than being at right angles to each other. Tides,...

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What is fire made out of? Flames are glowing gases. Combustion releases the gases by chemical reaction. Heat causes them to emit light.

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Where is God? If we don't know how he became.Then how do we know besides faith he has not forgot us? Religion is based on a 'leap of faith' that transcends observation and logic. If you need physical proof of god's existence before believing, you might not find it.

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A tree trunk of uniform cross section of area 0.5 sqm is made of wood of relative density 0.8 What is the mass of a length of 1m of trunk? Volume = (cross-sectional area)*(length) Volume = (.5)*(1) = 0.5 cubic meters = 500,000 cubic cm Mass = Volume * Density = (500,000 cm^3)(.8 g/cm^3) = 400,000 g = 400 kg

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What is the purpose of leap year? It's to make the calendar year stay aligned with the astronomical year so the solstices, equinoxes, and certain church holidays always come about the same time of every year. Leap years began with Pope Gregory. A year is about 365.25 days long. That extra quarter of a day is saved up to make one full day every 4 years. There are minor corrections less than once a century.

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Is the the cell membrane of a virus is fragile and sensitive to air pressure? Can you can kill viruses by holding your nose and blowing air up from the lungs into the sinuses and airways, which pressure destroys their body? 1. Viruses are not cells and have no cell membrane. 2. The modest pressure generated as you describe would have no effect on viruses. 3. It might, however, cause damage to your sinuses or ear drum.

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What is 1 direct evidence (from a scientific study) that demonstrates the fact that dioxide comes from h2o in photosynthesis? By 'dioxide' I assume you mean oxygen gas, molecules of O2 each consisting of two oxygen atoms bound together. O2 is normally just called oxygen. (Dioxide is a chemical suffix in compounds like carbon dioxide that contain oxygen and other elements.) The easiest direct evidence is to grow plants in a sealed system, then measure changes in gas concentrations.

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I was wondering why my university (U of Toronto) would require me to take chemistry as a compulsory credit if I am majoring in biology? Life is chemical machinery. There's not much point in studying biology without understanding molecular biochemistry. Surely you'd like to understand some of the theoretical basis for how life works at the most fundamental level?

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The filament in the bulb is made up of what thing? Mainly tungsten, a metal with an unusually high melting point.

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How much energy could be generated if the WHOLE planet was covered in the most modern solar cells? I read a similar calculation recently. I think the solar collection area is on the order of just a few hundred square miles to meet's the world's energy demands. But not in my backyard! How about the Sahara desert? Or those sparsely inhabited stretches of Arizona & New Mexico -- they could be the solar 'Persian Gulf'! Photovoltaic cells are not necessarily the most...

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So, who prays to god when they want something? Football players who want that extra point. God has favorite teams, you know...

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Which of the following would be considered a heterozygous dihybrid genotype? Ww, SS, WWSs, WWss, WwSs WwSs. You should look up these terms in your assigned reading.

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Can we see dna through a light or electron microscope Not through a light microscope, which has a resolution of only a couple of microns or so. I think EM can resolve condensed DNA with attached proteins in a properly prepared specimen, but you won't clearly see a double-helix.

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What forms of energy are created/released during a plasma arc discharge? Approx what percentage of each? There's broadband radiation that spans most of the EM spectrum from radio to IR to visible light to uv & maybe a little x-ray. Heat is attributable to IR as well as local heating of surrounding gas. And since the arc disturbs the gas there are also sound waves produced (the zapping sound). Sorry, don't know percentages. Probably depends on specifics not given.

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Why are antibiotics added to media that are designed for growing fungi? To suppress unwanted bacterial growth.

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Is the speed of light constant every were in the universe YES -- it's constant and all observers in all frames of reference will always measure the speed of light identically. This is the founding principle of Einstein's special relativity. This refers to the speed of light in a vacuum. When passing through matter (dust clouds, glass, etc.) it can slow down a bit. In the laboratory it can be made to slow WAY down by exotic materials.

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Is time constant everywere in the universe No. According to relativity, time & space are intertwined in a 4-dimensional space-time. What's constant everywhere is the speed of light. Consequently not all observers will agree on whether or not two events occur simultaneously, nor will they agree on how quickly their clocks are ticking. So in a very real sense time is not constant. Mind-boggling but true!

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Should they release the unabomber given that he is smarter than 99.999% of the human population? Just because he's a mathematician doesn't make him some kind of super-genius. But that's beside the point. How do you justify giving freedom to a craven, criminally insane killer? I don't think the judge's sentencing guidelines take IQ into account.

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In the movie the godfather what was the name of the restaurant Louis' Restaurant in the Bronx is where meeting is held with Michael, Sollozzo, and the police captain.

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The son is 22 yrs old the father is the sons age plus half hisown age again. How old is the father? Let F = father's age. "the father is the sons age plus half his own age again" ...translates into: F = 22 + F/2 Solution: subtract F/2 from each side: F/2 = 22 F = 44

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What is a hypermetabolic pulmonary nodule? A pulmonary nodule is some kind of lump or lesion in the lungs. Hypermetabolic is a descriptive term used with PET (positron emission tomography) scans, where they inject radioactive glucose for imaging. Hypermetabolic lesions metabolize glucose at a rate higher than the surrounding tissues. A hypermetabolic pulmonary nodule could be a tumor or an infection. Other tests must be done to...

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Were the Nazi's just a fluke and whats the liklihood another Hitler may try to succeed in the future? "All that is necessary for the triumph of evil is that good men do nothing." --attributed to Edmund Burke The Nazis were just one in a long line through history of people united by a combination of nationalistic fervor and charismatic leader. Genocidal atrocities have actually have occurred many times since WW2.

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Is a lizard just a snake with legs? That's what it looks like to me... Snakes and lizards are both kinds of reptiles -- hence the similarity. They are different orders of the same class. Snakes evolved from 4-legged reptile ancestors. Some snakes have vestigial legs and rarely a snake is born with one or more actual legs -- indicating that it retains genetic instructions for making legs.

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How can I go about proceeding with my invention/idea? I had no idea those invention company's (like davidson and inventhelp.com) cost sooo much, not to mention a patent attorney. Any helpful advice? Is searching for investors a good idea? Most of those are scams. You should read "The Case Against Patents" by Don Lancaster -- look for a .pdf at this site: http://www.tinaja.com/patnt01.asp

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What is the number 4 infinity? Many answers have shown the SYMBOL for infinity. Nobody, however, has pointed out that 'infinity' is not a number.Your question, in fact, implies the false notion that it is. You have to be careful about what's defined and what's not. 1/x grows without limit as x approaches zero. We can even say lim(x --> 0) 1/x = infinity but that doesn't grant infinity the...

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Does anybody know where to buy a cheap Gömböc? I just checked the official site, and the cheapest one still costs 149 Euros - a bit much for a wobbly roly-poly toy, as fascinating as it is ... Thanks for making me aware of Gömböcs -- I'd never heard of them. A casual Google search turned up nothing but the expensive product you mentioned. Searching eBay came up totally empty. Maybe this is why: " The main technological challenge in producing a Gömböc is its extremely small size tolerance: a Gömböc of diameter 10 cm admits a tolerance less...

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Regardless of what you believe about Global Warming let's assume that its happening and its man-made for the sake of the question. Do you think humans would ever actually take the action needed to protect us or do you think vested interests would stop us? Well, man-made global warming appears to be the result of modern industrialization, on which the entire world economy depends. People are not going to regress to an agrarian 17th Century lifestyle. It appears that fighting global warming, therefore, is bad for business. That's what makes it such an inconvenient truth. "Vested interests" are many powerful corporations at the...

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In a DC circuit, which way does electricity flow? Electric current is defined as the flow of positive charge. In a circuit current flows from the positive anode to the negative cathode. What's confusing is that usually (but not always) electric current is actually carried by electrons in metals & electrons are negatively charged. So the flow of current is OPPOSITE to the actual flow of electrons. Sometimes electrical current is...

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Give one example for Restrictive pulmonary disorders and obstructive pulmonary disorders respectively. Restrictive: Pulmonary fibrosis Obstructive: Chronic bronchitis

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Junior's boat will go 15 miles per hour in still water. If he can go 12 miles downstream in the same amount of time as it takes to go 9 miles upstream, then what is the speed of the current? Time = Distance / Speed Let x be the speed of the current. Then equate the (unknown) times of travel: 12 / (15+x) = 9 / (15-x) Solution: Multiply both sides by (15+x)(15-x): 12*(15-x) = 9*(15+x) Expand: 180 - 12x = 135 + 9x Collect terms: 21x = 45 7x = 15 x = 15/7 mph

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What is the most weird way to measure the number π? Well, there's Buffon's method http://en.wikipedia.org/wiki/Buffon%27s_needle Lay out parallel strips on the floor and drop needle or toothpick (shorter than the width of strips) onto the floor. The probability that it will lie across a line between two strips is related to pi: If L is the length of the toothpick, and S is the width of the strips, drop the toothpick n times and...

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A circle has radius r and circumference c. Solve this equation exactly for r: c/(2r) = 22/7? *** I have to warn you : this question is of my elder brother and he majors in math at a university. Since 22/7 is merely an approximation to pi, I'd have to say this question only makes sense in non-Euclidean geometry, where the ratio of C/2R may be different from pi. Since 22/7 > pi, I'd guess this circle lies on a surface of negative curvature -- saddle-shape.

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To estimate the size of the bear population on the Keweenaw Peninsula, conservationists captured, tagged, and released 50 bears. One year later, a random sample of 100 bears included only 2 tagged bears. What is the estimated size bear population? The presumption is that if only 2% (2/100) of the sample were found to be tagged, then the original tagged group represents 2% of the total population. 50 is 2% of what? answer: 2500

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Your friend says that the law of momentum conservation is violated when a ball rolls down a hill and gains momentum . What do you say? Momentum is still conserved. This is no different than any falling body. The ball is attracted by gravity to the Earth -- but at the same time the Earth is attracted to the ball. In fact the Earth moves infinitesimally toward the ball -- that's how momentum is conserved -- but considering the Earth's mass, its final velocity is also infinitesimal.

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There's a psychic fair going on. I told one that if he was such a good psychic, he could tell what I thought of his profession. He responded that he wasn't a mind reader - he was a PSYCHIC! So what's the difference? Psychics take your money while committing fraud. With mind readers it's the other way around ;)

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Can a 90 pound child exert enough force to rock a full size school bus? If the bus is moving in traffic, the kid's movements are insignificant. If the bus is standing still, it might be possible for one kid to used timed movements (like pumping your legs on a playground swing) to excite the natural frequency of the bus's suspension -- assuming all the other kids are sitting still. Even then it would be a small effect -- the bus wouldn't rock very...

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Is this statement true or false? A Scalene Triangle must be Isosceles. False. In a scalene triangle no sides are equal. In an isosceles triangle at least two sides are equal. They are mutually exclusive: no scalene is isosceles and no isosceles is scalene.

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Use linear approximation to estimate the amount of paint in cubic centimeters needed to apply a coat of paint 0.02000 cm thick to a hemispherical dome with a diameter of 80.000 meters. I'm honestly not even sure where to start, please help! Where to start: Look up the formula for the surface area of a sphere. Use the given radius (after converting to centimeters) to calculate this area in square centimeters, then take half because it's a hemisphere. Multiply this surface area to be covered by the thickness of the paint to get the volume in cubic centimeters. Not sure what's meant here by 'linear...

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Why does the act of inhaling helium make your voice high-pitched? Helium has a much lower density (specific gravity) than air. This affects the resonant frequencies of the vocal tract, i.e., the fundamental pitch and mix of harmonics at which the vocal cords vibrate, giving rise to the "chipmunk" voice. The gas viscosity may be a factor, too. Just as breathing helium raises the pitch and changes the quality of the voice, an opposite effect is...

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Whats the strongest natural poison? Botulinum toxin (Botox). http://en.wikipedia.org/wiki/Botulinum

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What area of France was invaded by the Allies on D-Day? Normandy. Aren't you supposed to be reading this somewhere?!

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How does an electric motor work? Basic principle: Electric current to the motor generates changing magnetic fields inside the motor, which by various clever arrangements of magnetic attraction and repulsion causes the rotor to spin and do work.

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Arthur godfree seems like a reliable person,so do you think there could be or is there a zeta reticuli base in the dragons triangle,as well as on the dim side of th moon?I say zeta because mexico has the best window,and close to roswell. Arthur Godfrey was an entertainer, talk-show host and pitchman who died in 1983 Zeta reticuli is a star system 39 light years from Earth, visible in the Southern hemisphere, that's been used a number of times in science fiction -- see http://en.wikipedia.org/wiki/Stars_and_planetary_systems_in_fiction#Zeta_Reticuli I'm not aware of any connection between Godfrey and science...

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Does anyone know what the Quantum Generator Technology is and what it can do for ones health and well being? QUOTE: Quantum Generator Technology is an applied science that can alter the crystalline structure of a stone to frequencies of healing energy so that when the stone is worn on your body, such as wearing it around your neck or holding it in your hand, it raises the vibration of your body almost instantly! SOURCE:http://ezinearticles.com/?id=2015745 COMMENT: This is a classic -- technical...

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Why is copper where it is on the periodic table? Because of the number of protons in its nucleus, which in turn determines its configuration of electrons and thus its chemical properties.

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If a pregnant mother uses a heating pad for back pain after being told not to because of radiation to the baby, but then the baby comes out special needs, can she be declared incompetent? Electric heating pads emit only line-frequency electromagnetic radiation. That has NEVER been shown to be harmful to people or fetuses (otherwise we're all in trouble). It could not possibly have contributed to the baby's disability. Sorry, I'm not qualified to give LEGAL advice. But you should know that isn't any science to back up a claim that heating pads should be...

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Is vaccinating going against evolution? Could there be some major implications down the line? All medical therapy is 'against evolution', i.e., it interferes with natural selection. That's a good thing!

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If scientists have successfully transformed bacteria with human genes, what is one current use of the technology in medicine? Human genes can be inserted into a bacterial genome so the bacteria can be used to produce human proteins on an industrial scale, grown in large vats. Two examples of this are human insulin (some people are allergic to beef and pork insulin harvested from animals). Another is erythropoietin (Epogen), normally made in small quantities by the kidneys. It stimulates an increase in red blood...

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Why don't cats have knees? Here's an image of a cat skeleton: http://biology.kenyon.edu/heithausp/cat-tutorial/skeleton.jpg They have knees.

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What is a normal resting heart rate? 50-85 for most men & women

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How fast would a human be travelling if fell 41 feet (ignoring air friction)? Well, if you ignore air friction then it's the same for any object including humans. Assume no initial upward or downward speed. Use standard equation relating distance & time for constant acceleration: D = (1/2)*g*(t^2) Set D = 41 feet Set g = 32 feet/sec^2 Solve for t: t^2 = 2D/g = 2*41/32 = 2.56 sec^2 t = 1.6 seconds (until it hits the ground) When it hits it's...

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I read today that scientists found a galaxy that's 10.2 billion light years from earth. (1) would that be 186,000 miles x 10.2 billion? and (2) how many zeros is that answer? Jeepers, J and B! You forgot that the speed of light is 186,000 miles PER SECOND so a light-year -- in miles -- is 186,000 multiplied by the NUMBER OF SECONDS IN A YEAR, which comes out to 5.87849981 × 10^12 miles -- just under six trillion miles. That's for ONE light-year. So 10.2 billion light-years = 5.996 × 10^22 miles. About 6 followed by 22 zeroes. Or sixty sextillion...

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An airplane flying at 90m/s is accelerated uniformly at the rate of 0.5m/s2 for 10s. What is its final speed? Physics Question. Im desperate for this answer. I think its a two part question but Im not sure. Can someone please guide me through this to the During its (constant) acceleration it gains 0.5 m/s of speed every second (0.5 m/s^2) After 10 seconds it's gained 10 times as much speed as it gains each second. 10*(0.5) = 5 All together it gained 5 m/s. It's final speed is 90+5 = 95 m/s

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How many people currently reading this question are dead? Zero. Oh wait, are only dead people supposed to answer?

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Has the ever been an official report or sighting of an unidentified aircraft on Christmas Eve which could have been "Santa" in his "flying sleigh"? NORAD (North American Aerospace Defense Command), which normally is looking for incoming missiles or high-flying aircraft, has been tracking Santa & his reindeer on Christmas Eve for decades: http://www.msgr.ca/msgr-2/norad_and_santa_claus%2001.htm http://tobey.com/santa/english/history.html

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Can you type a noise a animal makes? Snake: "sssss"

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Do you say "snooty" or "snobbish"? I say arrogant or elitist. Maybe imperious.

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Last night i saw a U.F.O. but i wasn't sure it was a U.F.O. so i was wondering if aliens are real can you please tell me? thanks for your responses If you saw an unidentified flying object in the night sky, then (by definition) you saw a UFO. I've seen lots of UFOs. They usually turn out to be aircraft, balloons, satellites, atmospheric phenomena, optical illusions, etc. Some simply remain unidentified. If by UFO you SPECIFICALLY mean a visiting spacecraft piloted by alien creatures, then you would need some evidence to support...

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How many drops of liquid are in a teaspoon One teaspoon is 5 ml. Drop sizes vary, so it's impossible to answer this question authoritatively. But standard adult intravenous tubing uses drops ranging from 10-20 per ml -- as good a standard as any. So a teaspoon would contain 50-100 drops.

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Can a medically induced coma work for a short time on a person for a test of "suspended animation" without any side effects? Millions of people undergo general anesthesia for surgery -- that's a controlled, drug-induced medical coma. It differs somewhat from the barbiturate coma used for critically ill patients, and perhaps doesn't lower cerebral metabolism or oxygen consumption as much, but it's more or less the same thing. They wake up fine with little or no side-effects.

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If I use a rope that is r=10,000 kilometer long to draw a circle on Earth, what will be circumference of such circle? What is the formula? The rope's length IS the circumference. Isn't that what you mean by using the rope to draw a circle? Note that this circumference is less than the Earth's circumference at the equator -- the circle formed by the rope is not a great circle.

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Where are you most likely to find witch doctors? Hogwart's Medical School

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If the arctic ice cap melted, how would that make the oceans rise? Frozen seawater floating on the ocean, when it melts, doesn't really affect sea level. You can demonstrate the same thing with ice cubes floating in a glass of water. The rise in sea level expected with global warming is mainly from melting of ice in Antarctica and of mountain glaciers worldwide. THAT ice is supported by continental rock, so when it melts it adds water to the ocean. ...

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Can you name a famous person died this year? Walter Cronkite, for one. Here are a couple of general references for recent obituaries: New York Times http://www.nytimes.com/pages/obituaries/index.html Dead People Server http://dpsinfo.com/dps/2009.html

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Do you know anybody named "Derek"? I have a nephew with that name. It's fairly common.

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Why do we automatically shut our eyes when we sneeze and why is it impossible to keep them open? It's impossible for me -- even if I try hard to keep them open. This reflex is powerful indeed. But some people say they can.

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Can someone tell me how the differences in human height have become different over the generations? I mean when and how did people become taller than others? Like I don't get why my father is taller than me. but my grandad was shorter than my father? Given the rapid time scale, it probably has more to do with improved nutrition and prevention of disease than to genetic changes in the population.

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Referring to a geometric progression. Why does the formula S= a/(1-r) only work for -1<r<1? I have to 'explain why' it does not give a sum in the other cases not just demonstrate (this is the problem, i do not want to use the terminology incorrectly). For |r|>1 the terms get larger & larger in magnitude, so the partial sums can't possibly converge -- they just grow without limit toward infinity. In mathematical slang, the series 'blows up'.

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Why when any paranormal research is going on, do they forget to turn the lights on and go about it in the middle of the night w/ flashlights? It's makes for better television drama. 'Forgetting to turn the lights on' is accurate metaphorically as well as literally -- lol.

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How can anyone believe in evolution after reading about the Cambrian Explosion? You realize -- one would hope before asking such a question -- that the 'explosion' of diversity in animal body plans giving rise to entire new phyla, occurring in the Cambrian 530 million years ago, took place over MILLIONS OF YEARS. This is the blink of an eye on the grander time-scale of evolution (life began over 3 billion years ago). Sometimes it's called the...

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Is there life on mars? There's no evidence of past or present life of any kind. The sensational news in recent years is the substantial evidence that Mars once had large amounts of liquid water, which is considered essential for any kind of life. This improves the plausibility, but does not offer evidence, for past life on Mars. Then there are meteorites found on Earth which originated from Mars (no...

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Evaluate (-125)^-2/3 Start with the fact that five-cubed = 5^3 (5*5*5) = 125 So the cube root of 125 = 125^1/3 = 5 What is (-5)^3 ? It's -125. So the cube root of -125 = (-125)^1/3 = -5 (square roots of negative numbers are undefined; cube roots are ok) Next, x^2/3 = (x^1/3)^2 In other words, the 2/3 power is the cube-root squared Here, (-125)^2/3 = (-5)^2 = 25 Finally, the minus sign in the...

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What is this strange cloud formation on the attached URL? It was over water near an island (Perhentian Island, Malaysia). It's called a lenticular cloud http://en.wikipedia.org/wiki/Lenticular_cloud (lenticular means lens-shaped)

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An impulse is the product of the ______ on an object and the time during which it is applied. force.

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Do you think that show paranormal state is full of bull crap that comes on a&e? All psychic phenomena are 'bull crap'. I know that's not a popular answer around here, but none of it is taken seriously by scientists or other people who expect extraordinary claims to be backed up with credible evidence -- of which there is NONE for this stuff.

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Cells try to move sodium ions from the cytoplasm to the outside where the sodium concentration is 14 times higher than in the cytoplasm. this means sodium ions are moved out of the cell by what? Because the sodium ions are moving 'uphill' against an osmotic gradient, the process requires energy. It's known as ACTIVE TRANSPORT (active means energy-consuming) by sodium pumps, which are protein complexes embedded in the plasma membrane of the cell.

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Cells try to move sodium ions from the cytoplasm to the outside where the sodium concentration is 14 times higher than in the cytoplasm. this means sodium ions are moved out of the cell by what? [deleted -- AnswerBag glitch -- didn't post the first time]

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Which is greater ∞² or √∞ or exp(∞) Infinity is not a number so none of the three expressions in your questions are defined. You can't compare magnitudes of things that are undefined. You can ask, however, how the expressions x^2, sqrt(x), or e^x compare as x approaches infinity? Then there's no doubt that e^x will always be greatest.

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Define Nerve cell body? The main portion of the neuron containing the nucleus, most of the cytoplasm, and to which the dendrites are attached; as distinct from the axon, which is a long, thin appendage that projects to other neurons.

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Why does some peoples blood smell like parfum I'm a health care worker & been around a lot of ERs and ORs -- in over 30 years I've never encountered anybody whose blood suggested the odor of perfume, nor have I heard of such.

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Which country is the Niagara Falls located in? It straddles the US - Canadian border (New York & Ontario).

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I saw a sentence in a book: "We've such difficult problems that no one would like to solve". Well, as far as I know,we cannot abbreviate "we have" to "we've" if the "have" serves as notional verb(also called lexical verb) in a sentence. What do you think Interesting -- I've never seen this usage topic discussed, though I couldn't find any prescriptive guidelines after a few minutes of googling around. My Fowler's isn't handy just now. I suspect you are correct that such usage is best avoided, because it sounds peculiar and unclear -- as though something is missing -- though not necessarily ungrammatical. Better recast as...

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How do you spell the name of the character Courtney Cox Arquette played in Friends, is it Monica or Moniker? The character's name is Monica Geller Source: IMDB http://us.imdb.com/title/tt0108778/

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When it seems like many people are turning away from religion, why does the Bible continue to be the best selling book? Because over 90% of the world's adults are religious & 1/3 of them are Christians. Sad, really, that humanity can't shake its prehistoric preoccupation with superstition and magical thinking. It's a failure of education...

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Who was the first scientist to work with the principles of acceleration? Galileo, probably.

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What causes the most breathing problems and cancer. Cigarette smoking or town vehicle exhaust fumes? Cigarettes, by far.

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It took 4.5 minutes for 1.0 L helium to effuse through a porous barrier. How long will it take for 1.0 L Cl2 gas to effuse under identical conditions? Did you mean diffuse? Graham's Law states that the rate of diffusion of a gas is inversely proportional to the square root of its molecular weight. Helium (He) has a molecular weight of 4.0 Chlorine (Cl2) has a MW of 35.5 * 2 = 71 So chlorine gas should diffuse sqrt(71/4.0) = 4.2 times slower than helium. For the same volume & other conditions, if it takes helium 4.5...

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Is your vehicle older than 2000? I drive a 1999 Ford Taurus.

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What do you call your grandfathers, on your father's side and on your mother's side? One usually speaks of grandparents as MATERNAL (mother's side) or PATERNAL (father's side). Even more obscure substitutes are ENATE or AGNATE, respectively.

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Are cosmic rays responsible for genetic mutations? They're undoubtedly responsible for SOME mutations by changing a nucleotide base in DNA. But not all mutations are caused by ionizing radiation & not all ionizing radiation is cosmic rays. Cosmic rays are also implicated in causing occasional flipped bits in computer memories, which can corrupt a file or even crash the system.

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What is a quincunx? A quincunx is a geometric pattern consisting of five points, four of them forming a square or rectangle and a fifth at its center. It forms the arrangement of five units in the pattern corresponding to the five-spot on dice, playing cards, or dominoes. Source: http://en.wikipedia.org/wiki/Quincunx

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A ball is thrown upward. Its initial vertical component of velocity is 20m/s and its initial horizontal component of velocity is 12m/s. What is the ball's speed 1.0 seconds later? The vertical component of velocity is influenced by constant acceleration of gravity (little g) which = 9.8 m/sec^2 = (9.8 m/s)/s. So after one second, by definition, the ball's upward velocity has decreased by 9.8 m/s. With initial 20 m/s, after 1 second the upward velocity = (20 - 9.8) = 10.2 m/s. Meanwhile the horizontal velocity component doesn't change because there are no...

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Does global warming mean that "The Devil" has won? Sure it does -- if you're thinking at the neolithic level and regard every atmospheric phenomenon as the magic of powerful gods. A dreary intellectual existence indeed. If you're a scientist -- if you try to understand the world based on physical observation & logical inference -- then global warming is understood as a slowly increasing threat probably brought on by human...

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How do u make a bomb with barely anything? i dont got much money Why don't you call the FBI -- they're bomb experts.

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Why has it taken so long for the Unification of Electricity to be discovered on EinsteinGravitydotcom? Electricity and magnetism (E&M) were unified in late 19C by JC Maxwell with his eponymous set of 4 equations of electromagnetism, which even predicted yet-unknown radio waves. Einstein's 1906 theory of relativity was, in turn, inspired by the principle that Maxwell's equations are invariant in moving frames of reference. Electromagnetism was unified with quantum theoryby...

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How do you clean your intestine? I don't. They don't need cleaning. They're supposed to be full of bacteria and food in various stages of digestion. Theories of disease based on retained toxins adherent to the intestinal wall is 100% quack pseudoscience, supported by zero evidence, used to promote fake medical products and services for the purpose of separating you from your money. Colonic irrigation is among...

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Did you know that Charles Darwin denounced his theory of evolution on his death-bed? Asked & answered many other times on AB, such as here: http://www.answerbag.com/q_view/993079 Here's a good answer: http://www.talkorigins.org/indexcc/CG/CG001.html And -1 point to the questioner, not for the content of the question (we see all kinds of wacky things on AB) but because it's STATED as a forgone conclusion -- not posed as a question -- as if pushing a...

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What is your favorite amphibian Axolotl. Cool name. Some axolotls exhibit neoteny, where adults fail to undergo metamorphosis & remain aquatic & gilled. This turns out to be related to thyroid hormone! They're also studied as models of limb regeneration.

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Are your earlobes free or attached? Attached.

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Is it proper english to say " she glanced up at him diffidently. Seems fine to me. Here's the definition of diffident; http://dictionary.reference.com/browse/diffident

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What one should not lose in life? Temper Sense of Humor Curiosity about the world

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Dc shock is dangerous or ac shock? DC is as dangerous as AC shock if you're talking about really high voltages like on long-distance power transmission lines. With alternating current, however, there is a higher risk of cardiac fibrillation, i.e., putting the heart into a fatal arrhythmia where it doesn't beat properly to produce a rhythmic pulse, but instead just sits there and quivers without actually pumping...

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Do butterflies remember their life as a caterpillar? Hardly. They barely have brains -- nothing as advanced as the brain of, say, a goldfish. It's doubtful they have any kind of explicit memory or that they can remember what happened even a minute ago. Of course all animals are capable of a limited degree of *learning* but that's not the same as memory. It's fun to anthropomorphize lower creatures as if they were people; too bad...

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Why do my fingers move and why do you and I exist? What was before I was born and what would there be after I'm dead? Space, time, gravity, the measurement problem in quantum mechanics, E=mc2, and so on..... ??? Life? We're still struggling with 'how?' If there's an answer to 'why?' it's totally out of reach. It's not clear that 'Why?' is even a meaningful question to ask about physical existence.

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What is the function of a chemical buffer in media? To resist changes in pH.

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What does paramecium do in the daily life of the organism? Eat; Digest; Excrete waste; Swim around; Reproduce; Walk the dog

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If the wavelength of a light wave is increased by 10 times how would the frequency, energy and speed of the wave change At 10 times the wavelength, the frequency would be 1/10 of the original. The energy of the photons would therefore also be 1/10 of the original. The speed of light never changes.

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I you have 5/9 * 1 1/5 would you create an improper fraction and multiply them? or would you separately multiply 5/9 by 1 then 5/9 by 1/5. Or would they both have the same answer? By far the most common approach is to first convert 1-1/5 to the fraction 6/5. Then multiply. Mixed fractions are seldom used in math, except perhaps to report the final result of a calculation.

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Mathmatics-What are the two prime numbers, that if multiplied, would generate a 400-digit number? Please help. If the primes are roughly the same size, they should be around 200 digits each (maybe only 199 digits). Or it could be a combination such as a 100 digit number and a 300 digit number. The number of digits is proportional to the log of the number, hence they are roughly additive. In any case, there are probably many thousands of pairs of primes whose product is 400 digits. (And...

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Should freshmens be aloud to Wear Make up? You mean 9th-grade girls? I'd say minimal and tasteful -- but each school sets its own policy. Of greater concern is to work on English skills: The plural of freshman is freshmen. The words 'wear' and 'make' should not be capitalized in your sentence. Make-up (in the sense of facial cosmetics) is normally hyphenated.

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The below statement is true. The above statement is false. Which one is the correct answer? This is a variation of Epimenides' Paradox. In its simplest form: "This statement is false." Its truth value (true or false) is indeterminate -- neither true nor false.

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What is the difference between analog and digital signals? In an analog signal the voltage may assume any numeric value within some continuous range, changing smoothly with time. In a digital signal the voltage may assume only two discrete values, jumping between one & the other with time. These are square pulses. A pictorial diagram would be far easier to understand than this verbal description, but that's the best we can do here. Hope...

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A semicircle with diameter PQ sits on an isosceles triangle PQR to form a region shaped like a two-dimensional icecream cone. If A(theta) is the area of the semicircle and B(theta) is the area of the triangle, find lim(theta-->0^+) A(theta)/B(theta)? The question omits a definition of theta -- is it angle PRQ at point R which is the vertex of the isosceles triangle below the semicircle? As I understand your description the semicircle is fixed in size so A(theta) is constant. As theta approaches zero, the triangle below the semicircle grows longer & longer (i.e., PR and QR grow in length) so its area B(theta) approaches infinity. ...

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Do you believe in UFO's and if so, why is it that they just fly around and don't try to comunicate? whats your view on this? Despite the huge fringe subculture surrounding UFOs, there is no credible physical evidence that unidentified flying objects represent extraterrestrial spacecraft or that Earth has ever been visited by aliens. UFOs are simply unidentified flying objects -- I've seen lots of unidentified things flying in the day or night sky. So what? Most are eventually identified as aircraft,...

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What is an organism that makes its own food called? Autotroph. (example: photosynthetic plants) Aren't you supposed to be reading this somewhere?

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Three watermelons and two cantaloups weigh 32 pounds.Four watermelons and three cantaloups weigh 44 pounds. All watermelons weigh the same, and all cantaloups weigh the same.What is the weight of one cantaloup and two watermelons? 3W + 2C = 32 (eq 1) 4W + 3C = 44 (eq 2) One way to solve this system of 2 equations in 2 unknowns is to solve for C in terms of W: Subtract eq2 - eq1: W + C = 44-32 = 12 So C = 12 - W Substitute into eq 1: 3W + 2(12-W) = 32 3W + 24 - 2W = 32 W = 32-24 = 8 So C = 12-W = 4 W=8 and C=4 The question is, how much is 2W + C ? = 16 + 4 = 20 pounds

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Why are many small cell more efficient at exchaning nutrients and waste than one large cell? The metabolic requirement of cells -- amount of nutrients consumed and amount of waste produced -- is proportional to the VOLUME of the cell(s). The ability of the cell to absorb nutrients and excrete waste products, however, is proportional to the SURFACE AREA of the cell(s). For the same total volume, many smaller cells have a higher surface area to volume ratio than one big cell. This...

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Why would it be really bad to fill someones iv drip with pure water? explain what it would do to their cells? It's about osmosis. Cells are enclosed by a semi-permeable membrane that allows water to flow freely across it BUT restricts the movement of ions and other solutes. Therefore, because of the internal composition of cells, pure water would flow into cells under an osmotic gradient, causing them to swell and burst like overinflated balloons. In the case of blood this is known as...

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Have u ever seen a Ghost? Do u believe in them? Pls only the truth. No and no. Ghosts exist only in the fertile imaginations of people. There has never been any credible physical evidence for the existence of ghosts. People are irrational, however, and lack of evidence never persuades the gullible and credulous masses whose world view is based on 'magical thinking'. A world inhabited by ghosts is more fun and satisfying to believe in -- reality is...

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I am constantly moving. I love the sea, what am I? Any of the millions of aquatic animal species.

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What do you believe is the main cause of the Apollo 13 disaster? Was it human error or equipment error? Human error -- but NOT astronaut error. There was more than one voltage standard in use among the contractors who designed the oxygen storage systems, leading to a design error. A thermostatic switch was supplied with the wrong voltage, causing it to weld itself shut when activated, causing overheating, causing the oxygen tank to explode.

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How are atoms different? (Don't tell me they aren't) Each element has a unique number of positively-charged protons in its nucleus, which in turn requires the same number of bound negatively-charged electrons. Because of the nature of electrons -- and quantum theory which describes it -- the number of electrons is crucial in determining the chemical properties of that element. Indeed all of chemistry might be described as the interaction of...

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Why does a doctor leave the room when you change? He's going to see you naked anyway... First, the doctor doesn't see you completely naked -- in a complete exam he or she might see every part of you -- but not all at once. Patient's are usually either given a gown to wear after removing their clothes, or they are asked to strip only down to their underwear, which might later be temporarily removed for the complete exam. But it's really all about social convention...

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Is it legal to change lanes in an intersection According to my understanding of laws in the U.S.: NO!

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I want to make a model on centre of gravity or eqiulibrium.For example,a rocking horse toy or something like that.Any suggestions?Can anyone tell all the requirements and procedure?Thank you. There's an old trick performed at the dinner table demonstrating the principle of center of gravity: Make the claim that you can balance a quarter (or other thick coin) on the rim of a drinking glass. Most people will bet it can't be done. Then take two forks placed end to end (tines overlapping) with the coin jammed between the tines -- this makes a rigid assembly with the fork...

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What is the measure of the larger angle of two supplementary angles if two-fifths of the larger angle is five less than the smaller angle? Let x = measure of the larger angle. It's supplement is 180-x So the word problem translates into this equation: (2/5)x = (180-x) - 5 Now it's simple algebra. Can you solve it without further help?

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How many of the positive integers less than 10000 contain the digit "1" at least once? You're asking how many 4-digit integers in the range 0001 to 9999 contain the digit 1 at least once. I'd consider a related question: How many of these integers do NOT contain a single digit 1? Each digit may take any of 9 values: 0 or 2-9. Since there are four digits, the total number of such integers is 9^4 = 6561. Thus the answer to the original question is 9999 - 6561 = 3438...

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Will someone give me a link to a vary detailed frequency spectrum.. diagram.. or rather a timeline.. well more like a hertz'-line anyway.. including like basic sound though radio, am, fm, mic wave, ir, basic light, uv, xr, gamma rays and the next.. thnx This diagram is whimsical but mostly true: http://blogs.libr.canterbury.ac.nz/media/9/20080306-electromagnetic_spectrum.png

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Is it possible for the stream of liquid water to reach supersonic speeds? There are industrial cutting machines which use high-pressure jets of water that emerge from nozzles at something like 2 or 3 times the speed of sound. They are capable of ultra-precise cutting of materials ranging from rubber to steel. They are especially useful when you don't want to heat the material or don't want gas, dust, or other environmental hazards.

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How do you find the mass of a brick without weighing it? Did you learn F = ma ? If so, you can re-arrange the equation to read: m = F/a where m is an unknown mass. So if you apply a known force F and measure the acceleration a, you can then calculate m. In my high school physics lab (lo these many decades ago...) we mounted a brick on a roller skate & measured acceleration when pulled horizontally by a hanging weight attached by string...

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Potassium has an atomic number of 19. An atom of potassium (K) may become a potassium ion K+ by? a. losing an outer orbital electron b. interacting with another potassium atom c. giving up a neutron d. gaining an outer orbital electron e. all of the above a.

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Bicycle tire is 52 inches in circumference. how many inches the tire will cover for the 1 and 2 revolutions? In one revolution, the tire covers a distance equal to its circumference.

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How does tapeworm uses binary fission Normally it reproduces sexually and lays eggs. There's a process called strobilation by which tapeworms can sometimes reproduce asexually by budding: http://en.wikipedia.org/wiki/Strobilation In cestodes, the whole body except for the head and the neck undergoes strobilation continuously, reflecting the important role reproduction plays in the parasitic mode of life. The strobilating...

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Http://video.google.com/videoplay?docid=6460130356432628677# This Set, created by a reclusive IBM researcher, is governed by the simplest equation/expression This is the famous Mandelbrot set -- named after the guy who invented fractal geometry. It's considered one of the most complex objects in all of mathematics. It is recursively complex -- endlessly detailed as you zoom in. The Mandelbrot set was discovered around 30 years ago. Here's a clickable link: http://video.google.com/videoplay?docid=6460130356432628677#

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Does a vertebrate have an eoskeleton? and does an insect have 6 legs?? coz i didnt think that all insects have 6 legs . Vertebrates (animals with backbones) have endo-skeletons -- the bones are inside the soft tissues. Intervertebrates such as insects have an exo-skeleton -- the hard parts form a shell around the soft tissues. All insects have 6 legs. Some related groups of arthropods, however, have more. Spiders, for example, are arachnids rather than insects -- they have 8 legs.

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Have you ever heard of the theory we evolved from aquatic apes? What do you think about what Elaine Morgan (see URL ref) has to say? http://www.aquaticape.org/ http://www.blue-genes.net/2009/08/aquatic-apes-ted-and-the-attack-of-the-armchair-scientist/ http://en.wikipedia.org/wiki/Aquatic_ape_hypothesis#Reception These links might suggest that this is fringe science with no evidence to support it.

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Please help me with 3x^2-16x+5. Thank you!!!! 3x^2 - 16x + 5 can be factored: ( x - 5 )*( 3x - 1)

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Scar tissue is what type of tissue? Connective tissue, mainly. Lots of fibroblasts making collagen.

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Why do ice cubes melt Heat always flows from hot to cold. In ice-water, heat from water melts the ice. The molecules gain enough energy to break free of confinement in a crystal and begin moving independently as a liquid.

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Two cars travel in the same direction along a straight highway, one at a constant speed of 59mi/h and the other at 77mi/h. assuming they start at the same point, how much sooner does the faster car arrive at a destination 11 miles away You have to calculate the time it takes each car to arrive. Time = Distance / Speed Here distance is the same for both -- 11 miles. But you have to work out the time for two different speeds. T1 = 11/59 = 0.186 hours T2 = 11/77 = 0.143 hours They differ by .043 hours .043 h x 60 min/h = 2.6 minutes Now you do the rest of your homework.

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In a collision between a subway train and a sportscar both moving at 50 mph, would you rather be in the subway or the sportscar? (This is a momentum question)? The train is much more massive and thus (at the same speed) has most of the system's momentum. Since total momentum is conserved, after the crash it will still be in the direction the train was traveling, with just a little lower speed. The occupants of the train have only undergone a little acceleration (well, deceleration is negative acceleration) so maybe they're just shaken up,...

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How did water come about to the Earth? Below are excerpts from a Wikipedia article: Origin of water on Earth http://en.wikipedia.org/wiki/Origin_of_water_on_Earth Some of the most likely contributing factors to the origin of the Earth's oceans are as follows: * The cooling of the primordial Earth to the point where the outgassed volatile components were held in an atmosphere of sufficient pressure for the...

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What is something that needs to be invented to help us in our everyday lives? (Be detailed. It cannot be magical.) A highly efficient battery (suitable for cars) whose energy density is comparable to gasoline. A cure for cancer or a vaccine to prevent it. A material with enough tensile strength to allow space elevators to be built. A computer that NEVER crashes !

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A physics book is moved once around the perimeter of the table of dimensions 1m by 3m. if it ends up in its initial position what is the magnitude of its dislacement? Zero. It's like it hasn't moved.

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Why is rubber a bad insulator? Rubber is a good insulator / poor conductor.

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Is it phototropism when sunflowers turn to face the sun? When sunflowers turn to face the sun, that's phototropism. Photo = light; Tropism = turning http://en.wikipedia.org/wiki/Tropism A tropism (from Greek, tropos, to turn) is a biological phenomenon, indicating growth or turning movement of a biological organism, usually a plant, in response to an environmental stimulus. In tropisms, this response is dependent on the direction of the...

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How do you create a fast amplifier with a 1x10^6 gain and a positive voltage output? I can't give you details, but high amplifications can be achieved with what's known as a Darlington pair. This is a 2-transistor device where the collector current of one becomes the base current of the other. If you google the term I'm sure you can find links to spec sheets. A gain of one million is quite high, however. I think Darlingtons have gains that are more like...

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What happens to toxic waste when it gets churned into the earth? The main problem is that it can get into ground water and pollute the water supply. Besides the risk to humans, it can seriously impact animal and plant life as well.

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The measure of angle 2 is 8 less than 3 times the measure of angle 1. If angle 1 and angle 2 are a linear pair, what are their measures? Let X = angle 1 If they are a linear pair, then angle 2 = 180-X (normally called supplementary angles). So the word problem translates as: 180-X = 3X - 8 Add X to both sides: 180 = 4x - 8 Add 8 to both sides: 188 = 4X Divide both sides by 4: 47 = X So angle 1 = 47 degrees, angle 2 = 180-47 = 133

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What unit of measurement is used to measure wavelength? Nanometers = 10^-9 meters. Red light, for example, has a wavelength around 650 nm. An older unit is the Angstrom, which is 1/10 of a nanometer. In the example above, the wavelength would be 6500 Angstroms.

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How does the bounce surface affect how high a ball bounces? The ball hits the surface with a certain kinetic energy. After it bounces a portion of this energy has been retained as kinetic energy by the rebounding ball. The rest of the kinetic energy gets converted to heat by the molecules of the surface on which is bounces. The difference between bouncing on, lets say, a steel plate versus a thick carpet is the relative amount of kinetic...

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As alcohol thins your blood, is there anything you can consume, solids or liquids that helps to thicken it? First off, so-called blood thinners are actually anticoagulants -- medication or other substances that interfere with the blood's ability to clot. They don't 'thin' blood in the sense of diluting the liquid or reducing its viscosity. Also there's no such thing as a blood thickener. In some medical conditions it's desirable for the patient's blood clotting...

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If something is traveling away from you and maintaining a constant speed, is it true that the further away from you, the faster it travels (relative to you)? Or how does that work? Not in any ordinary sense. On a cosmic scale, however, when distances are measured in hundred of millions of light years or more, then the expansion of the universe must be taken into account. Because SPACE ITSELF is expanding it carries distant objects apart with a relative speed that increases their speed of separation. Indeed the farthest objects in the universe are speeding away from us...

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How do i factor 2x^2 - 11x + 5 (2x - 1)(x - 5)

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Apart from letters in current affairs, name something of which there are 14. 14 days in a fortnight 14 pounds in a stone (British weight)

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What state of matter is a radio wave or rays like gamma? are they liquid solid or gas or plazma? Electromagnetic radiation is not matter, i.e., it consists of photons which have no mass -- just energy. Only atoms & molecules can exist as solid, liquid, gas, or plasma.

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I was riding the subway train, when all of I sudden I notice an ad outside the train on the tunnel walls with motion. It appears as if I was watching it on television. How do they do that? Do they get a screen to follow the train? It's based on the principle of the zoetrope http://en.wikipedia.org/wiki/Zoetrope#Modern_times " In April 2006, the Washington Metro installed advertising using the zoetrope system between the Metro Center and Gallery Place subway stations. A similar advertisement was installed on the PATH train in New Jersey, between the World Trade Center and Exchange Place stations." For...

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(Plucks a daisy from the ground.) Says: 'She loves me, she loves me not. She loves me, she loves me n.....How did this game end for you? Most daisies have 34, 55 or 89 petals. Those numbers ...are the 9th, 10th, and 11th Fibonacci Numbers. Source http://library.thinkquest.org/27890/applications5.html So, bubblegum72, the odds are about 2:1 in favor of it being an odd number rather than even. Odd = she loves me; Even = she loves me not. Love wins by a big margin! I once saw a cartoon showing a robot plucking a daisy,...

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Do insects feel pain? If you pick up an ant and accidently injure it, it jerks around. Compared to mammals, insects and other invertebrates have simple nervous systems and tiny brains. All animals react to stimuli that signal potential harm -- even single-cell microbes. These reactions are deeply entrenched by natural selection. But don't confuse reaction to, and avoidance of, noxious stimuli with feeling pain. Indeed to 'feel' anything implies a certain higher...

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Do you think the human body is a failure by design? No. Since it wasn't 'designed' by anyone, it makes no sense to label it a failure. The human body of course has weaknesses and vulnerabilities. That's typical of what natural selection produces.

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Does the plasma membrane have a bilayer of lipid molecules with proteins molecules embedded in it? Correctamundo.

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It is illegal for an employer to inquire about your health status during an interview, so why is it legal to drug test would-be employees when urine screens can reveal information about your health (what medications you take, pregnancy, etc.)? I'm no lawyer, but drug screens ONLY test for a handful of mind-altering drugs & only those particular results are reported. Other conditions potentially revealed by urinalysis would not be tested because they would not be ordered, so the lab won't run them.

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Solve the equation. 8.2 + -4g This is not an equation -- there's no equals sign. You could rewrite the expression as 8.2 - 4g Not much else you can do.

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How long will it take a 10# weight to fall 10 feet? D = 1/2 A T^2 where D=distance, A=acceleration, T=time Rearrange: T = sqrt(2D/A) If D = 10 feet and A = 32 ft/sec^2 (earth gravity) then T = sqrt(20/32) = 0.79 seconds The weight of the object is irrelevant as long as you ignore air resistance.

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Is there anything smaller than quarks? (Something physical. Not nothing, obviously. That's like dividing by 0) Quarks and electrons appear as point-like particles with no further internal structure, to the limits of our ability to probe the structure of matter. There may well be structure at a much smaller scale (this is the target of string theories and other speculation), but we have no means of testing such hypotheses.

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Can you tell what age a certain animal lived to by its bones? if so how? In juvenile animals the bones lengthen in so-called growth plates at the ends of the bones, which disappear upon reaching adulthood. These can be measured after death or even fossilization. The relative proportions of bone lengths also changes during maturation. For instance, human babies have relatively large heads & short legs. Also in humans the skull bones start off separate but then...

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How many seconds does it take an object to fall one foot, when dropped? D = 1/2 A T^2 That's the formula for distance D as a function of uniform acceleration A and time T. Rearranging, T = sqrt(2D/A) where sqrt means 'square root' Here D = 1 and A = 32 ft/sec^2 (approx.) -- the acceleration of gravity. So T = sqrt(1/16) = 1/4 seconds (250 milliseconds) This assumes earth gravity with no air resistance and an initial velocity of zero.

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With all the record low temperatures achieved this past summer, is this proof positive that the brilliant Great President Obama 'put air in your tires' policy to fight global warming worked perfectly, like all his policies so far? You don't 'get' global warming. Temperatures this season, this year, or even this decade are irrelevant. Global warming is a slow, inexorable trend measured in fractions of a degree that affects average global temperature, with the usual large local and season fluctuations -- which is why it must be graphed from worldwide data over many years to see the actual trend. ...

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Find domain and range of the following functions and sketch their graphs a)f(x)=sqrt(2-3x) b)f(x)=-sqrt(2x-x^2) c)f(x)=absolute advatage of 2x^2+x-1 The square root function is undefined for arguments less than zero. So the domain must exclude values of x that satisfy the inequality 2-3x<0, 2x-x^2<0, etc. What is 'absolute advatage' -- do you mean absolute VALUE ? Do you seriously expect anyone to GRAPH functions here on AB?

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What are the natural palindromes that exist between 100 and 400? They have to be of the form: 1a1, 2a2, or 3a3 where a is any digit (from 0 to 9). All together there are 3*10 = 30 such numbers.

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If I cloned myself, but switched the y chromosome with another x chromosome, then had sex with her, would that be considered incest or just maturbation? You could hardly call it masturbation -- it's still sex with another person, no matter how closely related. The usual taboo against incest is (genetically speaking) based on the risk of that heterozygous alleles will result in undesirable homozygous recessive traits -- genes whose DNA is faulty on both paired chromosomes. We've seen this among European royalty, for example. In the...

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I have a plane traveling x kph going x degrees East of North. A wind from the East moves the plane x amount of degrees east of north relative to the ground. Find the wind speed. I know the variables, I just need to the next step. I can't make sense of the question. If the plane's heading is already x degrees E of N, and there's a wind from the east, how can its heading still be x deg E of N ? Or how can it be blown further east?

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What energy range of light heats the earth? Mainly infrared.

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This may be a silly question but I'm going to ask nonetheless. When taking medication, how does the body know where to take it? Once it enters the bloodstream it can reach every cell in your body. Medications are molecules that target specific receptor molecules, like a key matched to a specific lock.

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What are the SCIENTIFIC objections to the theory of natural selection, made by SCIENTISTS? First, I do not want to hear from Creationists. Second, I do not want to hear from neo-Darwinists. A pox on both their houses. There aren't any. Darwinian natural selection is accepted as one of the most successful, robust, well-supported theories in science -- indeed in the history of intellectual thought. Those who challenge or attack the theory have a political or religious agenda to push with no credible evidence to contradict the theory. Legitimate science, however, is still plugging away to refine the...

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Factorize if possible a)x^2+x+2 b)3x^2+10x+8 a) x^2 + x + 2 The coefficients are a=1, b=1, c=2 The discriminant b^2-4ac is negative, so it has no real roots and will not factorize in the real domain. With quadratics like this just use the quadratic formula: x = -1/2 +/- (sqrt(7)/2)i so the factorization is: (x + 1/2 + (sqrt7)/2 i)(x + 1/2 - (sqrt7)/2 i) --------------------------- b) 3x^2 + 10x + 8 = (3x+4)(x+2) I did...

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Challenge: Name a mathematical function that is defined everywhere, but continuous no where. f(x) = 1 if x is rational f(x) = 0 if x is irrational Sorry I have no name for it.

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Why is Mars the red planet? It looks red, even from Earth. The soil is rich in iron compounds.

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The successor of a certain number when added to twice the number produces 61. What is the number? Let the number be X. The successor of X is X+1 The word problem translates as follows: (X+1) + 2X = 61 Solve: 3X + 1 = 61 3X = 60 X = 20

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Find the measure of an angle whose measure is 18 degrees less than one-half of the measure of its complement. Let X be the measure of the angle. It's complement is 90-X The word problem translates as: X = (1/2)(90-X) - 18 Solving: X = 45 - X/2 - 18 (3/2)X = 27 X = (2/3)(27) X = 18 Check answer: Complement = 90-18 = 72 half of 72 is 36 36 less 18 is 18 18 = 18 Check All measures are in degrees.

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Are you good at math? Complete the last two in this sequence: 1=3, 2=3, 3=5, 4=4, 5=4, 6=3, 7=5, 8=5, 9=4, 10=3, 11=?, 12=? What is the pattern? The number of letters in the spelled out number. One=3 letters, two=3 letters, three=5 letters, etc. 12 = Twelve = 6 letters

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Can you name a word that ends in the letter "s", but is not plural? This is ridiculous!

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What id the geological term for a billion years? Ga = gigaannum giga = one billion annum = year

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If some one tell you that they are sorry, would you believe them? Depends on who they are & what the situation is. An apology is just for starters -- they have to demonstrate a change in behavior as well.

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What does water form the basis of in the body other than mucus? Your body is 60-65% water. Every living cell is made mostly of water. Metabolism and other cellular functions cannot occur without water.

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How smart are you? Take this simple Common sense test and tell us your score. 11 out of 11. I've seen these old chestnuts many times before!

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What is the longest English word with no repeats of letters? From the website Fun With Words http://rinkworks.com/words/oddities.shtml Dermatoglyphics, misconjugatedly, and uncopyrightable, each fifteen letters long, are the longest English words in which no letter appears more than once. Fourteen letter words with this property are ambidextrously, benzhydroxamic, hydromagnetics, hydropneumatic, pseudomythical, schizotrypanum, sulphogermanic,...

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How many nanoseconds are in a year? (1 year)(365.25 days/year)(24 hours/day)(60 minutes/hour)(60 seconds/minute)(10^9 nanoseconds/second) Multiply it out. You do the math! Note that the units come out to nanoseconds/year.

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Which is more catastrophic, crashing into a massive concrete wall or into an oncoming car (same size and weight) traveling at the same speed as you? Why? They're the same. In either case, your car comes to a complete and sudden stop, i.e., its final velocity is zero. Since the damaging effects of the crash are related to deceleration, the instantaneous forces are about the same. One could argue that concrete is less yielding than the crumple zones of an oncoming car; thus the change in velocity might occur over a slightly longer time...

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If m<t=57,then t is an acute angle This is equivalent to asking, "Is 57 less than 90?"

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How would you measure the volume of granulated sugar? Any kind of volume measuring vessel will give you the approximate volume, but there will be microscopic air spaces in between the granules. If you want to exclude this for more accuracy you could use a liquid in which the sugar is insoluble. Maybe mineral oil or vegetable oil? Add the sugar & measure a change in volume.

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Does anyone have a scientific idea as to how the Rocky Mountains chain formed? From Wikipedia article on 'Rocky Mountains' http://en.wikipedia.org/wiki/Rocky_mountains The younger ranges of the Rocky Mountains uplifted during the late Cretaceous period (100 million – 65 million years ago), although some portions of the southern mountains date from uplifts during the Precambrian (3,980 million – 600 million years ago). The mountains' geology...

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Is it possible for an elderly woman 85 years young to have endometriosis, she still has everything and has had no problems in past. Recently Dr.told her she had endometriosis cancer. Is this possible. Might you be confusing endometrial cancer with endometriosis? They are not related, other than being disorders of the female reproductive system.

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In Scrabble, is it possible to place down the word "kick"? Sure -- using a blank for one of the Ks.

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Factor the trinomial..... x (squared)-11x +18 (x-2)(x-9)

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Twenty less than a number is more than twice the same number If the number is X, then you translate the words as: X - 20 > 2X With inequalities you can add or subtract from both sides. Subtracting X: -20 > X or you can write it X < -20 The number must be less than -20 (i.e., more negative)

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What is the Genome The total collection of all the genes that an organism has. In the case of humans, we have tens of thousands of genes spread across 23 pairs of chromosomes. All of these taken together (plus so-called junk DNA) constitute our genome. Each individual has a slightly different genome. All the genomes in an interbreeding population form a gene pool.

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What is the most basic status symbol? Your use of language -- how you speak.

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Who does the best Arnold Schwarzenegger impression you've ever heard? Jay Leno. 2nd place: Dana Carvey.

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I have had sex once, and i would like to do it again, but im worried that when i do decide to have sex again, the person i do it with will talk badly about me afterwards, and the people will make fun of me, what should i do to overcome this fear? Don't even consider doing it with a jerk who would 'talk badly about you afterward'. You're in control.

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How much KE does a car have if it is moving 100 m/s and has a mass of 1000 kg? Kinetic Energy = 1/2 * Mass * (Velocity)^2 If you stick with MKS units (meters, kilograms, seconds) then you don't even need to convert anything. So (1/2) times 1000 times 100-squared = 5 x 10^6 Joules

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Who invented the pinhole camera and when did they invent it? From the Wikipedia article on 'Camera Obscura' http://en.wikipedia.org/wiki/Camera_obscura#History Although the pinhole camera and camera obscura are credited to Ibn al-Haytham (Alhazen, 965–1039),[2] for the first clear description[3] and correct analysis[4] of the device and for first describing how an image is formed in the eye using the camera obscura as an...

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How can stars exist if there is no oxygen in space? We refer to stars 'burning' as a euphemism. It's a nuclear fusion reaction taking place at extreme temperatures & pressures the likes of which we never see on earth. It is not chemical combustion in the ordinary sense, such as occurs when fuel & oxygen are ignited to make fire. In that sense the sun & other stars do not 'burn', nor are they 'on...

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When a hypothesis is proven wrong, what is the next step? Abandon it and make a new hypothesis. This will suggest new experiments. Keep plugging away...

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Write in simplified radical form by rationalizing the denominator. (2(sqrt5)+3) / (3(sqrt5)+7) The trick with denominators like this is to remember that (a+b)(a-b) = (a^2 - b^2) where a or b may contain radicals. Since (a^2 - b^2) contains no a or b terms, the radicals have disappeared. In this example, multiply numerator & denominator by (3sqrt5 - 7) Then the denominator becomes (3sqrt5)^2 - 7*7 = 3*3*5 - 49 = 45-49 = -4 which is definitely a rational number. ...

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Rationalize the denominator and simplify: sqrt 35/ sqrt 55 sqrt(35) / sqrt(55) = sqrt(5*7) / sqrt(5*11) = sqrt(7) / sqrt(11) To rationalize, multiply numerator & denom. by sqrt(11), noting that sqrt(11)*sqrt(11) = 11 sqrt(7)sqrt(11) / 11 Or if you prefer sqrt(77) / 11

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Find the equation of a cosine wave that is obtained by shifting the graph of y = cos x to the left 2 units and upward 1 unit and that is horizontally compressed by a factor of 3 when compared to y = cos x You shift the curve as required by replacing x with x+2 & replacing y with y-1. Horizontal compression is accomplished by replacing x with 3x. Putting it together: y-1 = cos(3x+2)

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What do you call it, stomach, tummy, belly, or somthing else? Abdomen.

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What do you think would be the most likely cause of the extinction of the human race? 1. natural disaster 2. the human race 3. something else Sadly I'd choose #2 as most likely: Our species will probably destroy itself -- some day, not in our lifetimes, but some day. The average lifespan of a technological civilization is unknown.

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Is it possible to convert computer files or programs into a coded light to be downloaded directly to the brain via the human optic nerve? ..post in error..

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Is it possible to convert computer files or programs into a coded light to be downloaded directly to the brain via the human optic nerve? Sure -- it's called reading! If you mean direct downloading as if the brain were some kind of computer memory, then the answer is emphatically no. Present-day science hasn't got the slightest clue how human memory and attention works, much less an engineered interface. Get real!

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Did you watch the "Duck and Cover" movie when you were in school? I was in elementary school in the 1950s & early 60s. Never did duck & cover drills -- never even heard of them until seeing the movie 'Atomic Cafe' in the early 80s. My school gym had a large, rotating civil defense siren perched atop it -- tested every Tuesday at 1 PM. I remember begging my parents to build a bomb shelter in the back yard in case of nuclear attack. Not that I...

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Someone punches an ATM when arguing with a loved one. There is no visible damage. Would he get charged anyway if a cop was around? Vandalism. If it looks like you were after the money, I suppose it could be attempted robbery?

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Its Bill O'Reilly's word of the day-Rapscallion. What is it? Rascal.

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I can comprehend the 4th spacial dimension only the way I can comprehend a literally "endless" anything. I cant really GET it. Is it like trying to imagine a sense that you've never experienced or is it something I can do if I think about it right? The 4th dimension (spatial, not temporal) really can't be imagined by our brains which process 3-dimensional inputs. We can project 4-dimensional objects into 3 dimensions to help visualize them, just as you can project a cube onto a flat screen or draw it on paper. Put a small cube within a larger cube & connect corresponding corners. That's a projection of a tesseract -- a...

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How well do -you- know the periodic table? My AP chemistry teacher offered a huge amount of extra credit to anyone who could memorize the periodic table (i.e., fill in a blank one). Nobody could do it. I'm not sure how common it is for professional chemists to commit the table to memory, but I'd guess that it's a fairly pointless thing to do, since the table is so easily referenced in printed or online form.

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Whats a number that comes after 10 but not higher than fifty? Fifty.

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Do you believe in psychic powers? No. I have no supernatural beliefs. My reality is based on what is physically observed along with deductive reasoning -- what is sometimes called a naturalistic world view. In this view, burden of proof for extraordinary claims falls on the claimant to produce evidence, because you can't prove a negative. Moreover this evidence must pass certain tests of validity, such as...

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I always get a lot of pimples on one side of my face, and the other side is always clear! I don't talk on the phone a lot, so what could it be from? Maybe you tend to rest your face on one of your hands?

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Where exactly in my chest is my heart? In the center of your chest, extending from the upper breastbone (where the great vessels connect) to the left nipple (the apex of the heart).

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Am this is a very important question can any one tell me what is wrong with me i can feel energy from objets but mosty plants and water and i feel somthing inside of my hands like electricity It's all in your head. Seriously. There are no electric fields emanating from the objects you describe -- and if there were, then OTHERS would sense them as well.

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Graph the circle 4x^2+4y^2-16x-24y+43=0 4x^2 + 4y^2 - 16x - 24y + 43 = 0 Divide by 4: x^2 + y^2 - 4x - 6y + 43/4 = 0 Rearrange: x^2 - 4x + y^2 - 6y + 43/4 = 0 Complete the square for the x terms by adding 4 to both sides: x^2 - 4x + 4 + y^2 - 6y + 43/4 = 4 (x-2)^2 + y^2 - 6y + 43/4 = 4 Complete the square for y terms by adding 9 to both sides: (x-2)^2 + y^2 - 6y + 9 + 43/4 = 4 + 9 (x-2)^2 + (y-3)^2 + 43/4 = 4 + 9 ...

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Microbiology lab: What morphological structure is responisble for bacterial motility? Flagellum or cilia.

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Why is water incompressible? It's not PERFECTLY incompressible but most liquids, including water, have very limited ability to be compressed -- the molecules simply can't be forced any closer to each other than they already are. Outer electrons of the atoms will repel one another.

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How could the smallest thing in existence create the biggest thing in existence? This is what the Big bang theory suggests! Expansion. At first there was rapid, exponential expansion (the inflationary era) followed by slower but continued expansion. This is the inescapable conclusion of a century's worth of physical observation and careful reasoning.

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Why does water thin as it streams from a faucet? The water speeds up because it's falling by gravity. Since flow is constant, the faster the stream the thinner it gets to maintain constant flow (volume per second).

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Is a dog both multicellular and prokaryotic? No. Like all multicellular organisms, it's eukaryotic.

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Can Bees really affect your cell phone? This article says so. Do you believe what it says. http://www.associatedcontent.com/article/219279/bees_cell_phones_is_your_cell_phone.html?cat=9 The link you posted says that cell phones can affect bees, not the other way around. Supposedly it disorients them, though no evidence or references are given. It's attributed to George L. Carlo, who studies health effects of EM radiation. Colony collapse disorder in honeybees has been intensively studied in recent years, the consensus seeming to be an infectious disease. That cell...

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If matter is anything that takes up space then does anti-matter not take up space? Could you store an infinite amount of anti-matter in a dixie cup? Matter is anything with mass. Taking up space is a secondary feature. Anti-matter has many of the same properties as ordinary matter. Anti-water, for example, would be expected to have the same properties (density, boiling point, etc.) as ordinary water. You could store anti-matter in a Dixie cup only if it were made of anti-matter, too -- an anti-Dixie cup.

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Would you say a sneeze is like a small orgasm? Yes, in a way (not sexual of course). People have long noted the similarities, such as congestion of mucous membranes, growing tension followed by sudden release, a feeling of inevitability, etc.

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Does dowsing for well water really work? No, of course not. It's pure, grade-A baloney. There is no credible scientific evidence supporting dowsing -- not one shred. I'm talking about the kind of evidence that must pass certain tests of scientific validity, such as the use of control groups, experimenter blinded to location of targets, reproducibility, etc. The $1 million James Randi Foundation prize to anyone who can...

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Most influential scientist of all time? I'd go with Albert Einstein -- Time magazine named him 'Person of the Century in 2000. One could argue that Galileo was the guy who kicked off the era of modern science.

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Is there a difference between crickets and grasshoppers? Same order (orthoptera), different families. Ditto for katydids.

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If you wear a watch how far off must the time be until you reset it? 30 seconds. That way it's always correct to the nearest minute. A typical quartz movement gains or loses 5-10 seconds per month in my experience.

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What is a half-original man It sounds perhaps like a misunderstanding of the word aboriginal.

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How do you factor x^3-5x^2+x-5 (x^2 + 1)*(x-5) The first binomial expression can't be further factored using real numbers.

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If you could change one thing about earth, what would it be? Turn down the gravity a little :)

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Do thicker thighs mean a stronger heart? Large Thighs Protect Against Heart Disease And Early Death http://www.sciencedaily.com/releases/2009/09/090904071657.htm Should be at least 60 cm in circumference, based on 3000 people in Denmark over a period of more than 10 years. Published in British Journal of Medicine. Not stronger hearts but healthier ones.

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What is Histological Anatomy? Histology is the study of tissues, mostly as revealed at the cellular level. Histological anatomy is thus microscopic anatomy -- each organ or tissue type described by its appearance under the microscope, usually by stained slides.

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What is the hollow mask illusion? The Hollow-Face illusion is an optical illusion in which the perception of a concave mask of a face appears as a normal convex face. While a convex face will appear to look in a single direction...a hollow face can appear to move its eyes faster than the viewer: looking forward when the viewer is directly ahead, but looking at an extreme angle when the viewer is only at a moderate angle. ...

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How do celestial bodies travel through space They are free-falling according to Newton's laws, most caught in the gravitational influence of a larger body. Thus planets orbit the sun, moons orbit the planets, etc.

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What is -2 squared? The product of two negative numbers is positive** so (-2)(-2) = (2)(2) = 4 **To see this, consider that (-a)(-b) = (-1)(a)(-1)(b) = (-1)(-1)ab where a and b are positive numbers. Based on: http://mathforum.org/dr.math/faq/faq.negxneg.html

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Did Darwin turn back on his own idea while on his death bed? No. Creationists love to propagate this urban legend of Darwin recanting. Never happened. http://www.talkorigins.org/indexcc/CG/CG001.html

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If i have a hernia on the left side of my scroteum if i go into surgery will i have to get my left testi removed No.

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If the Universe is 13.7bb yrs old and started from a point and nothing can move faster than light, how can we see any objects >6.85bb light years away. Object takes 6.85bb yrs to get to where it is and 6.85bb yrs for the light to get to us = 13.7bb years The far reaches of the universe are expanding away from us at faster than the speed of light. This does not violate relativity -- nothing can move THROUGH SPACE faster than light, but SPACE ITSELF is capable of carrying objects away from each other faster than light speed. It seems counter-intuitive but it's true.

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Which is the two cells that make up the nervous system? I read my text book several times the only answer i came up is neurons and the second cell i still cannot find. mast cells gilial cells fibrocytes chondrocytes Glial cells of various kinds are found throughout the nervous sytem as 'helper' cells for neurons.

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Which layer of a rain forest receives the most sunshine? The canopy, of course, since it's at the top.

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Then they the wind is " sw 8"; is the wind coming from sw Or blowing sw? Coming from. The wind is 'out of ' the direction given.

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Why don't bats die of blood pooling in their brains during all that time they spend sleeping upside-down? Because of their small size the hydrostatic gradient from top to bottom is not much, compared to large animals such as humans. No doubt bats have other adaptations as well for hanging upside-down.

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In a quadilateral three consecutive sides are of lengths 2,3 and 4 . a circle of radius 1,2 is inscribed in the quadilateral.what is the area of the quadilateral? I didn't take the time to solve, but intuition tells me: Draw a diagram & construct radii where the circle meets the sides, creating some right triangles, some of which might or might not be similar. Apply Pythagoras & solve algebraically, etc... Good luck -- hope this helps. (I assume " 1,2 " means " 1.2" = "one point two" = 6/5 )

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Some argon gas is in a 42.0 L container at a pressure of 320 kPa. What is the pressure if it is transferred to a 51.0 L container at the same temperature? plz show the formula so i can follow along. Pressure and volume are proportional to each other when temperature is held constant. So P1/V1 = P2/V2 where 1 means initial and 2 means final. Here V1 = 42, P1 = 320, and V2 = 51. So P2 = P1 * V2 / V1 You can do the rest. [note: edited to correct initial error in answer]

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How do I find the area of a kidney shape? "Kidney-shaped" is not a standard geometric figure. It would have to be described more specifically as bounded by various particular curves before its area could be calculated mathematically.

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How to calculate force if mass is 17kg and acceleration is 1.26 m/s? Hint 1: F = MA Hint 2: In the MKS system the units are meters, kilograms, and seconds. If you use these units, no further conversion is necessary when you apply physical formulas. Hint 3: Every PC has a built in calculator.

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Can anybody explain Chemtrails to me? Aircraft engines burn fuel. What emerges as exhaust (as with any combustion) is largely carbon dioxide and water vapor. When this water vapor is released into the frigid upper layers of atmosphere at cruising altitude, it condenses as tiny water droplets or ice crystals. In addition the release of hot exhaust can cause supercooled water vapor already present in the air to condense as a cloud...

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Do different cultures have a different understanding of scientific method? No. The scientific method is universal. Like mathematics, the logic of the scientific method is accepted by all educated societies everywhere. Hence many international scientific journals. There is, unfortunately, a great deal of MIS-understanding of the scientific method.

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What is a type of asexual reproduction where a portion of an organism splits off and forms a new organism? Budding.

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The volume of a box is 357 inches what are some possible dimentions? 357 = 3 x 7 x 17 But there are infinitely many combinations of length, width, & height that produce that product.

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If the quadratic formula is used to solve 2x2 - 3x - 1 = 0, what are the solutions? 2x^2 - 3x - 1 = 0 a = 2 b = -3 c = -1 (b^2 - 4ac) = (9 - 4(-2)) = 9 + 8 = 17 x = [ -b +/- sqrt(17)]/2a x = (3 +/- sqrt(17)]/4 x1 = 1.780776... x2 = -0.280776... sqrt = square root

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Can someone please teach me how to do trigonometry with right triangles? Draw a unit circle whose center is the origin of the x-y plane. The x-axis is horizontal w/ positive toward the right; the y-axis is vertical w/ positive toward the top. Now pick any point on the unit circle. The line segment from this point to the origin is a radius of the cirlce, at some angle to the x-axis. The vertical distance from the point to the x-axis ranges from +1 to -1, and...

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Pediatricians become concered about the potential for brain damage when an infants temperture approaches 105 f. which class of organic molecules is most likey to be damagd by high temperture explain why Heat-labile proteins ? High fevers make some babies suffer grand-mal seizures, which has the potential for brain damage, though I don't know the molecular mechanism by which the seizure threshold is lowered.

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If someone is diabetic coma just been admitted to the hospital her ph level indicates she is in severe acidosis what is the normal ph level of the blood why severe acidosis is a problem Normal pH is 7.40. Anything in the range of about 7.35 to 7.45 would be OK. 7.25 or lower is fairly severe acidosis. The body maintains a narrow range of pH for normal cellular function. In acidosis the heart doesn't contract properly, kidneys work harder, breathing is labored, and everything is generally out of whack.

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There is a 30 percent chance that a bidding firm will get contract A and a 40 percent chance they will get contract B. There is a 5 percent chance that they will get both. Are the events independent? will get contract B. There is a 5 percent chance that If they were independent, we would expect the chances of getting BOTH contracts to be the product of (getting A) times (getting B) = 0.3 * 0.4 = 0.12 = 12%. Since the chances of both is only 5% rather than 12%, they must not be independent -- getting one lowers the chances of getting the other.

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Suppose 5 friends went to watch their friend play ice hockey.He scores a hat trick and they all throw there hats on the ice. the ref picks up the 5 hats and hands 1 back to each friend.what is the probability that no one will get their own hat back? For the first person, the chances are 1/5 that they get their own hat and 4/5 that they don't. Likewise for the 2nd person, the chances of NOT getting their own hat is 3/4. Similarly 2/3 for the 3rd person, and 1/2 for the 4th friend. The last (5th) person gets whatever is left. All together, the chances are: (4/5)*(3/4)*(2/3)*(1/2) = 1/5 = 20%

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How does the heart know to beat, I know its involentary but what regulates it. Inside the heart are special pacemaker cells that fire off impulses at regular intervals, triggering heartbeats. The exact rate is regulated, moment to moment, by a combination of inputs from the nervous system (such as the vagus nerve) and circulating hormones (such as adrenalin).

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If Leah is 6 years older than her sister,Sue, and John is 5 years older than Leah, and the total of their age is 41. Then how old is Sue? L = S + 6 J = L + 5 = S + 11 L + S + J = 41 (S+6) + S + (S+11) = 41 3S = 41-17 = 24 S = 8 Sue = 8 Leah = 14 John = 19 8 + 14 + 19 = 41

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Does it do you any damage to "click" your back? No -- it's like cracking your knuckles. In your back it's the facet joints between vertebrae. Harmless & satisfying feeling -- no real benefit, either.

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What is the difference between alkaline and galvanised batteries An alkaline battery is one type of Galvanic Cell.

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Whats the densest elemant? Osmium is the densest element.

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If you were a Primate which one would you be? I *AM* a primate -- specifically a human.

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How many galaxies are visible to the naked eye? None -- except our own Milky Way spread out across the sky.

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Do Velocity Turner's save you gas milage and increase horsepower like they say the do? It's called Velocity Tuner. It's just a fitting for the air intake that swirls the air & is supposed to improve combustion & thereby mileage. I searched the web for reviews & discussions. Seems most people who bought one felt they wasted their money. It was commonly pointed out that if they really worked as advertised, manufacturers would have routinely incorporated...

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Where is the appendix located? In the right lower quadrant of the abdomen, attached to the cecum where small & large intestine meet.

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How many of You know where you were conceived? My mother told me It was in the back seat of a 1956 Caddilac in 1959. She was certain because it was the only time that year they did not use protection and because of the timing. In a Fallopian tube!

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If a self-aware android was powered by a hand-crank and it was capable of cranking itself, would this be perpetual energy? Would he therefore run perpetually off of his own energy source? The system still requires externally-obtained energy -- electricity, food, whatever. The work expended turning the crank inevitably exceeds any energy returned to a storage device like a mainspring, battery, etc., powering the android's arm. It will run down unless energy is added. That's the 2nd Law of Thermodynamics "You can't even break even." What you're...

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"When the body consumes fewer calories than it absorbs, the fat reserves increase."(Quoted from Women's Strength Training Anatomy - Frederic Delavier.)Does this mean that when one eats less calories than necessary they actually gain weight?Please explain. I think by 'consumes' they mean 'burns up', as with exercise; and by 'absorbs' they mean 'eats'. So, despite the poor wording, they're stating the obvious: Burn less calories than you eat & you'll gain weight.

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Does it seem like something supernatural is happening with the numbers and dates in your life? No.

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Why do all the planets in our solar system all seem to follow the same plane in their orbit of the sun? Why do none of the planets follow a longtidunal orbit around the sun or a diagonal orbit around the sun? The entire solar system apparently condensed from a single cloud of dust and gas, all swirling in the same general plane. By the principle of conservation of angular momentum, the bodies orbit in that same plane.

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Why does an atom increase in size when you move down a group of elements It has 8 more electrons than the one above it -- these have to go into a different 'shell' (orbitals) outside the inner electrons. More shells means actually bigger -- larger effective bonding radius.

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How does ejaculation differ from an yerection? in ejaculation, does semen just ooze out, or burt out(come out forcefully)? The latter, as the word implies (eject, not ooze).

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When someone says "women wear makeup" does that imply the word "most"? Depends how it's used and spoken. As a bland declarative statement, it implies generalization: "Most women wear makeup" or "Women wear makeup as a rule with possible exceptions." If said to a woman who is not wearing makeup to express condemnation (with emphasis on the word 'makeup') it might imply: "As a woman you're supposed to be wearing...

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Are we right to think there can't be life without water? All life on Earth requires water -- cellular metabolism cannot proceed without it. Plant seeds, bacterial spores & the like are capable of withstanding years of dormancy in a dried-out state before eventually completing the reproductive cycle once water is available. As far as we know, there is no life anywhere but on Earth. Speculating on extra-terrestrial life, if it exists: ...

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What do we call the body structures in am animal? Organs.

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Given that stars are many light years from Earth, how probable is it that some of them visible to the naked eye no longer exist? [ Amended thanks to yeroca's comment below ]: Probably pretty likely, given that the Milky Way is on the order of 100 thousand light-years in diameter, hence visible stars may be many thousands of light-years away on average just within our own galaxy. Let's say stars are at an average distance of 1 thousand light years. Now the question becomes, How many visible stars blew up...

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Does anyone know how to get a clear complexion, i need to get rid of freckles and red cheeks, does anyone know how? and the red cheeks aren't from rosacea either, its not a medical problem or acne, or sunburn, its like natural blush, but i don't like it, I no skin expert, but you might have to accept your complexion as other people accept being too short, having brown instead of blue eyes, etc -- things you can't really do anything about. Not even with modern medical technology. I'm pretty sure. I'd recommend seeing a dermatologist, however, because (1) they're the experts; and (2) they can give you the best advice on how...

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How did hollywood get its name? From http://en.wikipedia.org/wiki/Hobart_Johnstone_Whitley#Hollywood : In the mid 1880's [Hobart Johnstone Whitley, also known as H.J. Whitley (October 7, 1847 – June 3, 1931), the "Father of Hollywood",] arrived in Southern California. He was well known as a land developer and many tried to follow on his coattails. As president and major share holder of the Los...

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What is a myth about Lemmings? That they commit mass suicide. From http://en.wikipedia.org/wiki/Lemming#Myths_and_misconceptions Driven by strong biological urges, [lemmings] will migrate in large groupings when population density becomes too great. Lemmings can and do swim and may choose to cross a body of water in search of a new habitat. On occasion, and particularly in the case of the Norway lemmings in...

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Why is pre-semen clear in color, and semen is yellowish in color? Pre-ejaculate is produced by the bulbourethral glands, while most of the ejaculate is made by the prostate (sperm are mixed with both, however). The chemical compositions are entirely different.

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What are the properties of manometer fluid? Ideally for accuracy: Non-compressibility & low coefficient of thermal expansion. I'm familiar with manometers using water or mercury.

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Is it true that whether the water spins down the drain clockwise or anti-clockwise when you flush the toilet depends on whether you're in the southern or northern hemisphere, or is this just a myth? It's mostly a myth. The direction water swirls in a toilet depends on the geometry of the toilet, how the tank empties into the bowl, etc. The Earth's rotation gives rise to Coriolis forces that account for clockwise & counter-clockwise swirling of large air masses moving from poles to equator. These forces are a large-scale phenomenon and normally don't apply to small...

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I know that usually people are concerned with killing bugs, but is there any way to go about saving a poisoned bug's life? I see them stumbling around all the time and the only thing I know to do is to kill them to put them out of their misery. There's no reason to believe they're in misery. Because insects have such simple nervous systems it's unlikely they experience pain or suffering. Most bugs seem rather nonchalant about losing body parts. Most insecticides act as irreversible nerve poisons, however, so the stumbling bugs are doomed. Do you avoid stepping on ants?

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Your car is traveling at the speed of light, what happens when you turn the headlights on? If you turn on your headlights while driving at the speed of light, what happens? Cecil Adams -- The Straight Dope -- June 17, 1988 http://www.straightdope.com/columns/read/709/if-you-turn-on-your-headlights-while-driving-at-the-speed-of-light-what-happens

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What is car pool tunnel syndrome? It's what linguists call an 'eggcorn'. The actual phrase is: Carpal tunnel syndrome. In the palm side of the wrist, tendons pass through a narrow sheath forming the so-called carpal tunnel. Swelling can cause pressure on the median nerve, leading to loss of hand function. This is the carpal tunnel syndrome.

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Is there a good trick to teach my daughter to make GOOD friends in school? I understand completely it must be a "chemistry" like among adults. But do you have any tip to share?? She is 12, starting 5th grade. She is a friendly sweet girl. Thanks a lot Get good grades.

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Plenty of new scientific knowledge is being created by privately funded research. Don't you think the knowledge should be shared for the benefit of public welfare? Privately funded research is often published and thus shared.

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What is the earth's elemental composition? The mass of the Earth...is composed mostly of iron (32.1%), oxygen (30.1%), silicon (15.1%), magnesium (13.9%), sulfur (2.9%), nickel (1.8%), calcium (1.5%), and aluminium (1.4%); with the remaining 1.2% consisting of trace amounts of other elements. Source: http://en.wikipedia.org/wiki/Earth#Chemical_composition

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Do you think that life on another Earthlike planet would closely resemble our life with obvious plants and animals? First, is it even carbon-based? If not then the answer is surely no -- they wouldn't resemble our life. If carbon-based, does it use cell-based metabolism? Are the fundamental bio-chemical reactions the same? Do other worlds have the equivalent of bacterial cells to give evolution a starting point? If not then, once again, they likely wouldn't be recognizable. If it turns out,...

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I have been told that GLOBAL WARMING was started in japan with factories and stuff, is that true? Global warming began with the industrial revolution, which started in Europe.

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Why would the distance between stars not be identical & perfectly geometric? Why would it be? Stars are more or less randomly distributed, even though they form large-scale symmetrical structures such as spiral galaxies. There are no physical processes that would result in perfect geometrical symmetry in their placement. Plus the fact that they are in constant motion with respect to one another.

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Could humans be 15 times larger in size? No -- not if you mean keeping the same proportions enlarged by a factor of 15. Such a person's bones would break under their own weight & their lungs & circulatory systems would not adequately meet their bodies' needs. This is due to scaling factors. If you enlarge each length measurement by a factor X, then the weight and volume rises as X^3 but the cross-sectional areas...

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A CO2 powered car is accelerated by escaping gas for 0.3 sec. In a 20 meter race (approx 1 second duration), what could be done to the wheels to improve the race time eg. different weight distributions or changes in the hub shape (convex, concave, flat)? 1. Reduce overall friction by using ball-bearings if possible. If the wheels/hubs are simply rotating around a metal axle, polish the axle & use graphite lubricant. 2. The car's thrust has to not only accelerate the vehicle forward, it has to also cause rotational acceleration of all 4 wheels. This can be minimized by using wheels with the lowest possible moment of inertia. Use...

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Cosmological evolution: in the original (and or) revised equation for the Big Bang, was dark matters mass in the equation. (no disrespect to Cosmological evolutionists.) though I am a creationist It is simply a question. You're asking about cosmology and the origin of the universe by the 'standard cosmological model' which rests on the well-proven big bang theory. The term 'evolution' does not apply here (just to be clear). When Albert Einstein developed his equations of general relativity, he added a term (the so-called cosmological constant) which allowed for a repulsive force of...

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What prevents a neutron star from collapsing even further? Electron degeneracy pressure http://en.wikipedia.org/wiki/Electron_degeneracy_pressure Correction (see below): Neutron degeneracy pressure: " In a neutron star lighter than the limit, the weight of the star is supported by short-range repulsive neutron-neutron interactions mediated by the strong force and also by the quantum degeneracy pressure of neutrons." The so-called...

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Will we every develp a Zombie bomb? A bomb that turns human beings into a sort of mindless Zombie? If so how would this bomb be effective and how would anybody believed it worked? It's called religion.

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If i had a wheel 2mts in diameter , suspended on an axle with bearings that weighed 550lbs. how much torque would it need to turn, Not enough information. The wheel is 2 meters (m.) in diameter, right? (mts is not a standard abbreviation). The weight of the axle and bearings would not seem relevant. What we'd like to know is how much friction is present at the bearings, and whether the wheel is loaded with some kind of torque already.

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Will the Universe expand forever or re collapse? Until a few years ago, that was the number one question in cosmology -- will the universe keep expanding and eventually end in 'heat death' -- or will it stop expanding and begin to contract, culminating in a 'big crunch' (or maybe 'big bounce')? Then, in the 1990s, they discovered that the expansion of the universe is actually *speeding up*! So now the big...

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Where is the geographic center of North America? Rugby, North Dakota, U.S. http://www.roadsideamerica.com/story/11486

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What concert hall is famous for its acoustics? Avery Fisher Hall in NYC

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As an amoeba reproduces by splitting in half and becoming two, can it live forever? In a sense, yes. All of its splits are effectively clones because in mitosis the DNA never changes (except rarely by mutation). Not like in sexual reproduction, where genes are uniquely mixed in each individual offspring. Binary fission generates over a thousand individuals in just 10 generations. If one or a few of them die, the others live on -- a more-or-less immortal line of amoebas...

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Can cockroaches feel pain? Doubtful. All animals react to noxious stimuli -- even single-celled organisms. But invertebrates such as insects (including roaches) have a far different nervous system compared to mammals. Just because they perceive painful stimuli does not mean that they experience the unpleasant emotional aspect of pain that people do. In other words, it's doubtful that cockroaches SUFFER from the...

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Engineers: I understand structures flex but is it normal for a bridge to flex this much? http://www.youtube.com/watch?v=DgXveBf_l6k Can any engineering professionals please address this? I am not an alarmist just curious. Thank you in advance. That's a cool video. Because it's time lapse video the movements of the bridge look faster than normal -- what apparently is actually quite gradual flexing & unflexing over several minutes. The camera angle, nearly parallel to the bridge, exaggerates this motion by foreshortening. Surely bridge engineers are aware of this behavior and have precisely measured it. My guess, though...

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Which structure has the lowest blood pressure in the systemic circulation? The vena cava, the final common vessel to carry de-oxygenated blood from the body to return to the right side of the heart, where it then enters the pulmonary circulation.

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A man has a daughter and a son. the son is 3 years older than the daughter. in 1 year the man will be 6 times as old as the daughter is now. in 10 years he will be 14 years older than the combined ages of his children. what is the man's current age? I'll try to answer because you're not dumping a whole load of homework problems like some people rudely do. This a classic '3 variables with 3 equations' problem -- you've got 3 people's unknown ages (man, son, daughter -- call them M, S, D) and 3 facts about them that you have to turn into equations involving M, S, and/or D. Word problems can be tough. ...

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Why is the ocean blue? First, it's a myth that it appears blue simply by reflection of the sky. Here's some info from the Library of Congress 'fun facts' website (URL below): " Blue wavelengths are transmitted to greater depths of the ocean, while red wavelengths are absorbed quickly. Water molecules scatter blue wavelengths by absorbing the light waves, and then rapidly re-emitting the...

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I was watching the history channel earlier last week, and they were talking about our military making robots that could think for themselves, and make their own decisions, and were armed with automatic assault rifles. scary ain't it? "Think for themselves" is a relative term. Research into artificial intelligence is still in a primitive stage. And yes -- it's scary indeed!

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Howcome boats made of steel/metal or whatever don't sink, and normal pieces of steel/metal do? Steel ships contain mostly air by virtue of their shape. Thus they can displace water without sinking. The density of the hull material is more or less irrelevant. Glass sinks, too, but you can float a glass bowl in a basin of water -- do the experiment to gain insight.

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What is fire made of? Flames are glowing gases. Is that what you mean by fire?

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Theres two types of ear wax, Asians have dry powdery light yellow colored earwax. While Europeans have gooey darker yellow earwax. They also said Native Americans were asian and spread down to Brazil. What would half Asian / Europeon earwax look like? There's no way to answer based on info in your question. It would depend on the specefic genetics of ear wax -- how many genes or alleles? How much penetrance? What is the dominance pattern? etc. The traits of hybrid offspring don't necessarily take on intermediate qualities of the parents' traits. Cross red and white flowers -- you don't necessarily get pink!

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Is the speed and direction of light affected by the curvature of space-time? The speed of light (in a vacuum) is constant everywhere in every frame of reference, regardless of speed, acceleration, or gravitation, without regard to any curvature of space-time -- every observer measures exactly c. By definition light travels in a straight line -- that's what we MEAN by 'a straight line' -- the path that light takes. So while space-time might be curved in...

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Time difference in UAE and USA One of the easiest ways to find time zones is right there on your PC: Right-click the clock display in the lower right corner of your screen...click 'Adjust Date/Time'...click the 'Time Zone' tab...click the down-arrow to bring up a drop-down list of time zones -- a very nice geography lesson! It lists Baghdad & Kuwait, Riyadh & Tehran as GMT+3, and Abu Dhabi,...

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Why is the sky blue? Rayleigh scattering.

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Other than the famous "Wow!" signal, have there been any other possible signals picked up by SETI? No -- or it would have been trumpeted all over the news. The SETI researchers are banking on the fact that absence of evidence is not evidence of absence -- given the vastness of the universe and the very limited parameters by which they survey the sky. And the prospect that tomorrow is another day -- when we might find the 'big broadcast'. Unlike the UFO nut-case subculture,...

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What reptile has the most fully developed "low to the ground" body plan, a snake,crocodile,lizard or turtle? It's tricky to discuss "most fully developed" in light of the fact that all reptiles listed are highly successful in having adapted to their respective niches. Clearly snakes are the lowest to the ground, lacking any means whatever of lifting their bodies. Crocs & turtles more or less drag their bodies with legs splayed outward. Lizards perhaps less so.

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IF AN ANGLE IS 10 DEGREE MORE THAN ITS COMPLEMENT, FIND EACH ANGLE..... Angle = x angle's complement = 90-x x = (90 - x) + 10 2x = 100 x = 50 The angles are 50 and 40 degrees.

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Add. simplify if possible. 3/x+ 7/x^2 Like all fractions, adding them requires a common denominator. Here that would be x^2. So 3/x can be multiplied by x/x to give 3x / x^2 Now you can add: (3x+7) / x^2 Further simplification is not possible.

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What did Albert Einstein once say was the "strongest force in the universe"? Snopes.com (urban legends reference website) discusses http://www.snopes.com/quotes/einstein/interest.asp a claim that Einstein once declared compound interest to be "the most powerful force in the universe." They conclude: "We suspect that this perspective on the power of compound interest is a fairly modern invention, one which has been retroactively placed into the mouth of...

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Why are some people that are so gung-ho about "Darwinism" also the same people that want to keep alive those that shouldn't survive according to the "survival of the fittest" doctrine? (vegetables, mentally retarded folk, etc) Are most people who accept biological evolution also supporters of eugenics? Not in my experience. Most people who accept the compelling evidence for evolution nonetheless -- like most human beings -- have serious moral / ethical issues with euthanasia, especially for disabilities that are compatible with life. One has nothing to do with the other. Besides, "survival of the...

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Since the laws for all dimensions are different, if you were to suddenly end up in one that you never belonged in the first place, the laws for that dimension wouldn't apply to you, and you could do anything you wanted. Agree or disagree, and why? As far as anyone can tell, there is only one physical reality, and it apparently consists of 4 dimensions (3 spatial, 1 time). It might be an illusion involving more dimensions (or fewer with the holographic principle!) but even if that turned out to be true, we are nonetheless stuck with the dimensionality of the universe in which our atoms are embedded. To speak of 'ending up' in a...

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When we consider y^2 = x, we typically rewrite it as y = ±√x. I know the two meanings are close enough to work in most cases. But is there a technical distinction between them? In its purest definition, what does y^2 = x mean? If x and y are variables, then y^2 = x expresses a relationship between them. If one variable is a function of the other then additional criteria apply. y = √x is a function in the form y = f(x) because the square root is defined to be non-negative, yielding a unique value. The relation y = ± √x gives all values satisfying y^2 = x, but fails as a function because...

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It's been 40 years since we landed on the moon. How many years more do you think it will take to reach Mars? 20-40 years

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What is the number of hebrew (meaning brown skinned) people said to survive the catastrophe ahead in the Bible? Hebrew does not mean brown-skinned. The origins of the word are described here: http://www.etymonline.com/index.php?term=Hebrew

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What is the joint between bones of the skull? They're called sutures.

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Who was the first man to walk in space? Alexey Leonov of the Soviet Union, in 1965.

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Can any manned moon missions land on the far side of the moon? Yes, but it would make communications with Earth difficult.

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How many Apollo missions actually landed on the moon? Six. That makes 12 astronauts who have actually walked on the moon.

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Do you have an agreement with a loved one that when either of you dies you will contact the other one in some way? If there is an afterlife? The magician Harry Houdini had such an arrangement with his wife before his untimely death from peritonitis. They had even agreed on a secret code word. But he never contacted her.

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Compare and contrast the two opposing theories for human species origins. What two theories? Surely you don't mean creationism and evolution -- neither are they both theories nor are they opposing. Scientifically speaking (as this question is posted under Science), evolution provides a satisfactory and unopposed explanation of human origins.

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Is it possible to use lightning as an energy source? The energy driving lightning is a massive separation of electric charges between the ground and cloud layer in certain weather, forming in effect a humongous charged capacitor. Lightning is the sudden high-current plasma discharge (neutralization) of this high voltage. My guess is that spontaneous lightning itself can't really be harnessed but that *induced* lightning (e.g., by shooting...

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If you shake a plastic bottle with vinegar, the bottle feels colder. Why? I think it works with plain water, too. Nothing special about vinegar. The liquid is a better conductor of heat than air is. So where your hand touches the bottle, if there's air on the other side it feels warm & if there's liquid on the other side it feels cold. Slosh it around and the liquid absorbs heat from everywhere your hand touches the bottle. After a while, of...

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Why do elements cannot be broken apart to give new substances? This is the most fundamental concept of chemistry. The molecules of a substance can be broken apart into individual atoms, but each element consists of atoms of the same kind which cannot be further broken apart. Well, actually atoms do come apart at high energies, and the nucleus comes apart at even higher energies, but under everyday conditions atoms can't be broken apart. Not the way...

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A car is going 10 mph. The driver hits the brakes. The car travels 3 feet after the brakes are applied. A while later, the same car is going 20 mph. The driver hits the brakes. How far does the car go after the brakes are applied? It sounds like you're supposed to assume the driver's reaction time is constant. Since distance traveled in a given time is proportional to speed, you can see that doubling the speed from 10 to 20 mph will thus double the distance traveled, from 3 feet to 6 feet. You could calculate the speed in feet per second & then determine the driver's reaction time (about 205...

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If a telescope is taking a picture of Proxima Centauri (star), is it taking a picture of the star as it is at that precise moment when the picture was taken or how it was 4.2 years before the picture was taken? We see it as it was when its light first left the star. So it is with all astronomical objects. Sunlight is about 8 minutes old, too.

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Solve and check 2p + 38 = 5p + 5 It works like this: TO SOLVE: 2p + 38 = 5p + 5 Add -2p to both sides of the equation: 38 = 3p + 5 Rearrange with variable on left & constants on right: 3p = 38 - 5 Calculate 38-5: 3p = 33 Divide both sides of the equation by 3: p = 33/3 Calculate 33/3: p = 11 Solved! TO CHECK: 2p + 38 = 5p + 5 (original equation) Substitute p = 11 (checking the solution): 2*11 + 38 =?...

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A.) to solve 8x + 7 = 2x + 9, what could you add to both sides so x is on only one side of the equation? You have two choices for getting x on only one side of the equals sign: (a) Put it on the left (b) Put it on the right In case (a) you add (-2x) to both sides, resulting in 6x + 7 = 9. In case (b) you add (-8x) to both sides, resulting in 7 = -6x + 9. As you can see it doesn't really matter which way you choose. Note that allowing both positive and negative quantities means that...

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Please help i am soooooo stuck maths help As you indicated yourself in one of the answers, you can rearrange the given equation x^2 + 10x + y^2 - 6y + 9 = 0 (x+5)^2 + (y-3)^2 = 25 which is a circle centered at (-5,3) with radius 5. " Now I have to find where the line y = -x + 3 intersects with this circle." Substitute this expression for y in the circle's eq: (x+5)^2 + (-x+3-3)^2 = 25 (x+5)^2 + x^2 = 25...

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Why do my turds always point due north? It's your magnetic personality.

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How sanitary is licking an envelope? do you use water instead? The adhesives on envelopes are safe to lick. Indeed some even come flavored. Like any chemical, however, there should be moderation. If your job requires you to lick hundreds of envelopes a day, I'd use water on a sponge. If you're just paying a handful of bills once a month, lick away. Another potential hazard of licking envelopes is paper cuts on the tongue or lips.

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If there were so many people who encountered ghost how come still ALOT of people dont believe in them? Because the 'encounters' weren't real -- they are in the imaginations of credulous, suggestible believers. Rational people with scientific world views will never 'believe' in ghosts unless some credible physical evidence comes forth -- so far totally zilch.

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Could someone summarize the basic premise of calculus for someone who never got past college algebra? You have a function y = f(x) (Actually THAT'S the most basic concept here.) Differential calculus describes how to calculate the RATE OF CHANGE, called the derivative, of the function. Integral calculus describes how to calculate the AREA UNDER THE CURVE, called the integral, of the function. The fundamental theorem of calculus says that these two descriptions of the function are...

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Why do moths come out at night (when it's dark), but then hover near a light? Why don't they just come out during the day like a normal butterfly? Moths and butterflies are two separate groups of lepidoptera. Most butterflies are diurnal (active during day) and most moths are noctural (active at night). Each animal behaves according to how it's brain is 'wired' by millions of years of evolution. Neither is normal or abnormal. Both groups are very successful in their respective ecological niches. The light-seeking...

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How is the potency of an animal's venom measured? Probably by serial dilution. The more potent the venom, the more it can be diluted yet still produce a reaction when injected into a mouse (or whatever). Note that 'potency' refers to how much or how little of a substance is needed. Not to be confused with 'efficacy', which is how well it works.

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As far as I know, insects don't have any vital organs that make most animals, animals. When you smush one, it's just a broken exoskeleton with a bunch of weird goop. How do they live in this case? Of course they have organs -- but their bodies are small and organs even smaller inside the 'goop' (hemolymph). They have nervous systems, digestive systems, respiratory systems, reproductive systems. No heart or blood vessels, however.

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Are there any bugs that are not insects? Are arachnids not technically insects? The phylum of arthropods (' jointed-legs ') is divided into 15 or 20 classes, of which the most common are: Insects; Crustaceans (includes shrimp, lobsters, crabs); Centipedes; Millipedes; Horsehoe crabs; Arachnids; Arachnids includes spiders, scorpions, harvestmen, ticks, & mites

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PLZHELPMEEEEEE :) (2a^3)^2 over (a^2)^-4 =? I'llhelpyouuuuuuu... Numerator is: (2a^3)^2 This is the same as (2a^3)*(2a^3) = (2*2)*(a^3 * a^3) = 4*a^(3+3) = 4a^6 -- ok? Is the -4 exponent in the denominator bothering you? A negative exponent is the inverse (or reciprocal) of a positive exponent. So (a^2)^-4 is the same as 1 / (a^2)^4 = 1 / [a^(2*4)] ok? = 1 / a^8 Appearing in the denominator it has the form of [1 /...

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Since the hubble flow is an indication of an expanding universe only in the past due to the lookback time, doesnt it indicate a non-expanding universe if we look locally in space which is more to the "now" time of the universe and see no expansion. It's true that uniform expansion is cosmic, not local (some individual stars in the Milky Way are blue-shifted). But evidence of uniform expansion inevitably implies contraction when you ' play the movie backwards ' to inquire about local history. The simplest explanation is a big bang some finite time ago. (Of course there are other lines of evidence for the big bang besides...

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Water can put out fire, why can fire melt ice? Besides the fact that its hot? What is this, the Middle Ages?! Rock-paper-scissors?! Is there supposed to be some deep, mystical connection between the two phenomena you ask about or some implied contradiction or inconsistency? Surely you understand why water puts out fires AND why fire melts ice. Science gives us a few simple rules that explain and predict both of these. Not sure I understand the question.

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What is reverse osmosis? Osmosis involves a membrane which is permeable only to water but not other substances. Sometimes called a semi-permeable membrane. In normal osmosis, some substance(s) dissolved in the water can't get across the membrane, so a concentration gradient forms. As a consequence water moves from lower to higher concentration. That's why living cells explode when placed in pure water. ...

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In data structures what is Bubble Sorting, Give its algorithm and example Bubble Sort is an algorithm, not a data structure. Other answerers have described the details. I learned it in Fortran :) Modern software uses built-in library functions. But it's good to understand what's 'under the hood' or 'inside the black box'.

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What is a simple math analogy to describe the huge math disparity preventing a Theory of Everything from being found? Physicists widely believe that any theory which can unite gravitation and quantum mechanics, & predict properties of known particles, involves structure at an extremely small scale known as the Planck length, on the order of 10^-35 meters. A proton's diameter is on the order of 10^-15 m (10^20 Planck lengths). The observable universe has a diameter something like 100 billion...

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I say "Global Warming" you say? ...an inconvenient truth. World economic growth, development & industrialization reveals yet another downside to give us pause.

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How much hp, as the space shuttle got?. The standard power measurement for the shuttle (shuttle's engine plus 2 solid rockets boosters) ranges from about 10 to 14 GW http://hypertextbook.com/facts/2001/StaverieBoundouris.shtml -- That's in GigaWatts, same units for rating power generating plants. 12 GW equals about 16 million horsepower. ...

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Does Greg Mendel concepts for genetic support evolution? ( his studies claims offsprings can only have traits they inherit from their parents) It's not true that 'offspring can only have traits inherited from parents' -- two heterozygous parents with a dominant trait can produce an offspring with a recessive trait. But more to the point, mutation -- which is outside Mendelian genetics -- is NOT the only source of the genetic variation that drives natural selection. Sexual reproduction allows reshuffling of genes to...

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Say you had two glasses of ice-cold water, same temperature, same volume, and you put one in a 90 degree room with still-standing air and one in an 80 degree room with constantly flowing air. Which would warm up faster? That's a tough one. On the one hand, the 80-degree room will warm the cold water faster because in addition to radiation and conduction, convection is also operating to transfer heat. On the other hand, radiative heat transfer depends on the difference of the *fourth power* of temperature, so those extra 10 degrees in the 90-degree room might transfer heat significantly more quickly. ...

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A shortage of phosphorus in the soil would make it especially difficult for a plant to manufacture Nucleic acids (DNA and RNA) contain phosphates. Also ATP & ADP, the common 'currency' of chemical energy in the cell.

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If each lottery has two winning tickets, and you buy two tickets to the same lottery, what is the probability that you will have at least one winning ticket? NOTE:To answer the question there are 2 lotteries in town, each of which sells exactly 100ticket You didn't buy any tickets to one of two lotteries, so that's out of the picture. There's a 100-ticket lottery & you hold two tickets. Either (a) both tickets are losers or (b) at least one is a winner -- those are disjoint (non-overlapping) outcomes whose probabilities must sum to 1. The chances that the 1st ticket is a LOSER is 99/100. Given that, the chances of the...

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Why are the three kingdoms of Nature Animal, Vegetable and mineral and not Animal, Plant and mineral? "Kingdom" is part of the classification of living things. Minerals do not belong to any kingdom. Everything in the world can be classified as living or non-living. Among the living, the main categories are known as domains, which include Bacteria, Arachaeobacteria, and Eukaryotes. The latter is sub-divided into the kingdoms of plant, animal, and fungi. Animal / vegetable /...

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What are worms reptiles, insects, or what The animal kingdom is divided into several major categories called phyla (singular phylum). One of these is annelids (roundworms). Earthworms are annelids. Another phylum is platyhelmenthes (flatworms). Another phylum is vertebrates (animals with backbones, including fish, amphibians, reptiles, birds, & mammals). No worms. Another is arthropods (jointed appendages, exoskeleton)...

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I have a reversed neck curve apparently. What effects does this have on the body? Cervical kyphosis ('reversed neck curve'): from AllAboutBackPain.com : --------- http://www.allaboutbackpain.com/html/spine_cervical/spine_cervical_kyphosis.html " Symptoms range from minor changes in the shape of your spine, to severe deformity, neurologic deficits, and chronic pain. Neck movement may become limited, making it difficult to turn the neck fully or to look up...

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Why should the level of water inside and outside the flask be equal? If you're going to dump a whole load of homework questions here on AB, at least discard the ones -- like this -- that can't be possibly answered because it makes no sense on its own. What flask? What water? GIMME A BREAK!

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Whats suicide cell phone mean? Don't know for sure, but I think terrorist bombs (improvised explosive devices) sometimes detonate when triggered by calling an attached cell phone -- or so I've heard.

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Any idea how to find the smallest possible interger,that when multiplied by 504,the product is a perfect square? You have to start by decomposing 504 into its prime factors, i.e., factor it. (The fundamental theorem of arithmetic assures us that there is one unique way to do this.) 504 = 2*252 = 2*2*126 = 2*2*2*63 = 2*2*2*9*7 = 2*2*2*3*3*7 504 = (2^3)*(3^2)*7 You want to find the smallest multiple that's a perfect square. In a perfect square each prime factor appears an even number of times...

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Can your sphincter read if it's a solid, liquid or gas? The sensory input that allows us to (usually) discern the solidity of stool comes not from the anal sphincter but from the large intestine at the end of the line -- the sigmoid colon and rectum. If you detect diarrhea your sphincter might have to work overtime.

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Use the table of logarithms to calculate the answers. 1) log 7.83 = ____ 2) log .068 = ____ 3) antilog 0.3814 = ____ 4) antilog (8.3174 - 10) = ____ Since I went to school before the invention of pocket calculators (!) I actually had homework like this. Of course it can't be done here on AnswerBag because YOU NEED THE TABLE. If they're still teaching how to use printed log tables then they're wasting your time and theirs. Trig tables too?

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A drop of water out of a faucet is about 1/4 of an inch across. Say there's a ball underneath the faucet, catching the water which is 4 inches in diameter with a small hole in it. Now, how many drips to fill the sphere? How many 1/4-inch diameter spherical drops of water does it take to fill a 4-inch diameter spherical cavity? The hard way: Calculate the volume of each drop & volume of the ball, then divide the larger by the smaller. Messy, involves pi, etc. An easier way: Spheres of all sizes are geometrically similar to one another. Here water drops are 16 times smaller than the ball in a linear...

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A person walks half way around the circumference of a circular path of radius 5.00m. A) Find the magnitude of the displacement vector. B) How far did the person walk? C) What is the magnitude of the displacement if the circle is completed? A. The person is displaced by the circle's diameter -- the length of a straight line connecting the initial and final locations equals the diameter. B. If C is circumference & D is diameter then C = pi*D (definition of pi) Half of C = etc. FIO C. Zero. Make sense?

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What does a 4.4 liter engine come out to be in CI?? Engine is in a 1981 camaro berlinetta 268.5 cubic inches. http://www.google.com/search?q=4.4+liters+to+cubic+inches&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a

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So, the higher the refresh rate (measured in Hz), the more constantly the image is being broadcast to the eye, and the more solid it seams (less blurry when motion is present). So what, theoretically, would the hz level of natural light from the sun be? There is no refresh rate. The sun emits continuous light -- no blinking or pulsing like tv or movies.

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Is travel a risk factor for blood clots? Sitting in a chair (such as while traveling in a plane, train, or car) for long periods of time can cause pooling of blood in the legs with increased risk of clot formation. The recommendation is the get up & walk a little whenever possible. While sitting you should from time to time stretch your legs or move your feet up & down to exercise the calf muscles.

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How can a cell make many different kinds of protein out of only 20amino acids? Of the myriad possibilities, how does the cell know which proteins to make? It 'knows' which proteins to make because the amino acid sequences are encoded in the genes and reproduced faithfully by the mechanisms of protein synthesis. The 20 amino acids make up a varied set of molecules with different affinities for water, different tendencies to lose or gain electrons, lose or gain H+ ions, etc. Some are attracted to each other, some repel each other, etc....

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Are there endless prime numbers? Yes, the primes go on forever. This fact isn't obvious, but was first proved in antiquity by Euclid.

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Does the World have a tilt on its axis, if so what angle? Yes -- 23.5 degrees. This causes the seasons.

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How do you see the unity of all Physical Laws? Unity? That's news :) But physics keeps striving to reduce the number of equations necessary to describe everything -- so called unification. It began when Newton unified gravity on earth with gravity in space. 1 equation. Unification continued when Maxwell reduced all the experiments on electricity and magnetism to just 4 equations. It continued with Einstein's special...

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Where is the switch to turn off the rain? It's a triangular tab set into the metal shaft between handle & canopy, or a button built into the handle. You depress it to OPEN AN UMBRELLA.

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If DNA REQUIRES PROTEIN COMPLEXES AND ENZYMES SUCH AS DNA POLYMERASE III where did these proteins and enzymes originate to transcribe and translate proteins if they are required by DNA in the beginning to be made? Like what came first DNA or proteins? That's the big question among scientists researching 'abiogenesis' -- the spontaneous origin of life on earth. Current hypotheses favor the so-called 'RNA world' model. RNA is capable of enzymatic activity much like proteins. So it's possible that RNA was a precursor to both DNA and proteins. Good question.

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Numbertime, 8/15. What is the first 9-letter word that pops into your heads? Numerator.

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So there is no centre of the Universe. What happens to "time"? Can we visibly see when the Big Bang happened? Can you theoretically travel back in time to when the Big Bang occured? We can see a remnant of the big bang. According to the Standard Cosmological Model time and space both began with the big bang, and the universe has been expanding ever since. One of the 3 pillars of evidence (other 2: Hubble's Law & observed abundances of H and He) on which big bang cosmology rests is CMB (cosmic microwave background) radiation, discovered in 1965, sometimes called...

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Television my rca 27 inch television has a picture but no sound. the volume bars work when trying to raise or lower the sound. Check the SAP (second audio program) setting.

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What would fireworks look like if you were flying in a plane and could see them? Has that ever happened to you? Yes, many years ago on the 4th of July, several simultaneous shows along the coast of Lake Michigan north of Chicago. It was really cool. Little puff balls of color, wayyy down there...

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How do "chimp years" compare to "human years?" e.g. 1 dog year = 7 human years. [Google: 'chimp longevity'] Chimpanzees in the wild can live into their forties but chimpanzees in zoos often live much longer. http://www.lpzoo.org/chimp-ssp/locations.htm They have a list of longest-living zoo chimps, which survived into their late 40s / early 50s (one to age 70). So it sounds like, to a chimp, 40s is like 70s or 80s for humans and 50s is like 90s. Overall...

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Is it faster to fill a container(bucket, barrel or whatever) with the garden hose out of the water than with the hose end immersed in the water? water pressure impede the flow? Yes, slightly. With the end of the hose underwater there is hydrostatic back pressure, depending on how deep the end of the hose is, which opposes driving pressure from the water pipe -- the net loss of pressure reduces the flow rate. Another factor: Water streaming from an underwater hose encounters higher viscosity when surrounded by water than when surrounded by air. This increases the...

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What is the answer to 2xsquared minus 3x minus 2 divided by 10 plus x minus 3xsquared? You can use x^2 to mean "x-squared" With this notation you can typographically write it: (2x^2 - 3x - 2) / (10 + x - 3x^2) The numerator factors into: 2x^2 - 3x - 2 = (2x-1) * x+2) The denominator (10 + x - 3x^2) is better written as: (-3x^2 + x + 10) = -(3x^2 - x - 10) This factors into: -(3x-5) * (x+2) So now your problem is: (2x-1)*(x+2) / -(3x-5)*(x+2) and you...

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Which animal has the biggest appetite? Blue whales eat up to 8,000 pounds (3,600 kilograms) of food every day during the season when they feed to store up energy reserves for the winter. Source: http://www.wisegeek.com/what-do-whales-eat.htm

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Determine the equation of the lines passing through points (-4,5) and (6,-1) y = mx + b Slope m = ( y2-y1 / x2-x1 ) = (-1 - 5)/(6 - -4) = -6/10 = -3/5 So y = (-3/5) x + b where b = y-intercept = constant Substitute one of the pairs of coordinates & solve... Good luck finishing.

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At what value of an angle we can get .75 times more value of x component and .25 times less value of y component? Final slope = 1.75 x and 0.75 y y/x = (0.75 / 1.75) = 3/7 angle = arctan(3/7) ~= 23.2 degrees

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Is there really a planet x? There really was a planet X predicted by Percival Lowell in the 19thC from perturbations in the motions of Uranus & Neptune. It was discovered in 1930 and named Pluto (now re-classified as dwarf planet). 'Planet X' has become a stand-in term for any undiscovered planet in the outer Solar System, regardless of its gravitational effect. Then there's Nibiru collision /...

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Is it possible to see a super nova with your eyes? no magnification Yes. A supernova explosion temporarily outshines its entire galaxy. In the year 1054 the Chinese recorded a supernova where today we see its pulsar remnant, the Crab Nebula -- about 6500 light years away.

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"why might sauceage & other ground meat product provide a better env. for the growth of food spoilage organism then solid cuts of meat" Greater surface area per gram of meat -- easier colonization by micro-organisms.

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What is the densest material known to man that has been made(solid hydrogen has only been made for a fraction of a second & I know lead is extremely dense, I would like to know more in depth information. like lead that is work hardened & soaked in H^-1 Osmium is the densest element, about twice as dense as lead, with iridium a close second. Source: http://en.wikipedia.org/wiki/Density#Densities_of_various_materials

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Ant parade. An ant marches from point A to point B on the cylindrical garbage can shown in the accompanying figure. The can is 1 foot in diameter and 2 feet high. If the ant makes two complete revolutions of the can in a perfect spiral, then exactly how f Your question is cut off & there is no figure. This type of problem, however, can usually be solved by 'unrolling' the cylinder into a rectangle, revealing the ants' path to be a straight line. If there's more than one turn around the cylinder you might have to represent this with additional copies of the rectangle side by side. Then it's usually a matter of...

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If two numbers are opposite of each other, are their reciprocals also opposite of each other? What is a valid reason for the answer? By 'opposite' do you mean of equal magnitude and opposite sign (like +5 and -5) ? If so then their reciprocals are also of equal magnitude and opposite sign.

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What causes ants, spiders, cockroaches, etc to be able to walk on walls and ceilings unlike humans? Much is made of special mechanisms of adhesion between their feet and the surface -- this indeed keeps them falling by gravity. But a major factor often ignored is their small size. Due to the physics of scaling factors, a bug has such a tiny weight that gravity simply doesn't dominate their world as a force to be overcome compared to humans or other large animals. If humans were as...

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Can I play most (if not all) classical music on a 76 key keyboard? It HAS to be better than a 61 key that I currently have now (which I use to play classical music like "Nocturne in E-Flat" by Chopin, "Moonlight Sonata," etc. Any way you could just trade up for an 88-key keyboard? Then you'll never have to pick & choose -- the world's entire piano literature will be possible. Try eBay or Craigslist?

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What is doubled when the velocity of an object is doubled? Momentum.

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If n is a positive integer and the product of all the integers from 1 to n, inclusive, is a multiple of 990, what is the least possible value of n? Please provide answer and explanation. Please provide answer and explanation. I'd start by decomposing 990 into its prime factors. 990 = 2*3*3*5*11 Since 11 is a factor, and being prime cannot be produced as a product of smaller numbers, it's the smallest possible value of n.

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What is the most complex and healthiest animal that's still alive? "Complexity" and "health" are not attributes that are easy to quantify for comparison. Even the humblest microbe on earth is still highly complex & usually healthy.

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What is smaller out of a quark and a neutrino? The most elementary particles (quarks, electrons, neutrinos, photons, etc.) appear to be effectively points in space with no associated size measurement (subject to Heisenberg of course). So it makes no sense to compare two different point-like particles by size in a spatial sense -- points are points. Some day string theories might allow us to zoom in on details. If by 'smaller'...

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Can an airplane become airborn (take off) by remaining stationary and moving the "ground" under it as on Myth Busters?? NO!!!!! If the plane is truely statiomary it is impossible !!!! The motion of the ground is essentially irrelevant. What matters is the motion of AIR relative to the WING. A headwind produces lift and if strong enough, could -- in principle -- lift an airplane vertically. There would have to be at least enough thrust to counter drag, or else it would simply 'blow away' in the gust.

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Calculate the density of sodium chloride with an unknown concentration. Th esolution has a masss of 11.1239 g and a volume of 10.30mL. What is the density of the solution? If the solution were pure water should weight 1 gram per ml, which would be 10.3 g. It's actual weight is greater because of the NaCl. How much greater? (11.1239 - 10.3) = 0.8239 g. This is dissolved in 10.3 ml making the final concentration: 0.8239/10.3 = 0.080 = 8.0% solution.

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Gravitational force is more at [1] poles [2] equator? Slightly more at the poles because the earth's rotation causes it to bulge a little at the equator, where the surface is thus a little farther from the earth's center than it is at the poles.

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Is star a polygon Yes -- a star shape is a polygon -- it's made from straight line segments joined at their endpoints and closed. What makes it different from squares and triangles, etc., is that it's concave rather than convex. Concave means that if you connect two points within the polygon's INTERIOR with a line segment, the segment might pass through points that are EXTERIOR to the polygon,...

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If you are rolling one dice...What is the probability that it takes more than two rolls to get a six? If it takes more than two rolls to get a six, this means that neither the first roll nor the second roll is a six. To NOT roll a six has a probability of 5/6. So the probability of no six in the first two rolls is: P = (5/6)(5/6) = 25/36 = 69% btw, the singular of dice is DIE -- one die, two or more dice.

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Why would a white wire melt behind a receptacle? The white side of the receptacle was scortched and about an inch of the insulation on the white wire was melted. A microwave was plugged in and it did not trip the circuit when it was in use. Assuming it was wired correctly to begin with, the white (neutral) wire might have loosened up, especially if it was backwired instead of under a screwhead; or it might have corroded (as copper does eventually). A poor connection is worse than no connection -- resistance causes heating, especially with high current loads like your microwave. Both hot and neutral carry exactly the same current,...

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Do you turn your computer off at night? No -- it's risky and not cost-effective. Cycling the main power always puts a strain on electronics & is especially bad if mechanical hard drives have to spin up & down rather than just keep spinning -- it makes a crash more likely. Less of an issue for flash-memory drives. I turn off the monitor, however -- no point in keeping that on. Some turn themselves off when inactive. ...

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Tell me if True or False. 1.Cells have a support structure within the cytoplasm called the cytoskeleton. 2. the exoskeleton is composed of thin, fibrous elements that form a framework for the cell. (1) True. (2) Should read 'cytoskeleton' rather than 'exoskeleton'. I'd also quibble about describing microtubules & microfilaments as 'fibrous'.

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If a person smoked a half of a joint a month ago and took 2 small puffs 2 weeks ago would they pass a urine test? Probably. For under $20 you can buy a self-test kit at a pharmacy & find out yourself.

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Which type spectrum is produced by an incandescent bulb? Blackbody.

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Mrs. K is dehydrated from a severe bout of diarrhea. When she tries to stand up, she feels faint and has to sit down again. What is this phenomena called? Orthostatic hypotension, sometimes called orthostasis or postural hypotension.

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Which is potentially more serious - a deep venous thrombosis or a superficial vein thrombosis? Explain your answer. The deep veins are larger, straighter, and connect more directly to the central circulation. Therefore a thrombus (blood clot) in a deep vein can break loose and travel to the heart and thence the lungs (pulmonary embolism), causing serious circulatory & respiratory distress or even sudden death. This doesn't happen with superficial vein clots.

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Did you know that the Chimpanzee's genome is 95% identical to ours? I just found that out thius weekend....WOW Some estimates put it at 98-99% identical (depending on whether you include non-gene DNA or not). Indeed our genome is something like 30-50% identical to that of yeast or other lower eukaryotes. We have many genes in common with bacteria, too -- all living cells share a common metabolism.

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Does the bible tells you about how we see colors & how we were created in different colors? Sure, the Bible goes into great detail about our trichromatic visual system, the molecular biology of rhodopsin pigments, the microscopic morphology of rods & cones, and the physiology of the visual cortex. Also the production of melanin skin pigmentation and its multifactorial genetic basis. After all, the Bible is the ultimate science textbook. Now, would you like to purchase the...

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Tom drove away from bigtown 10 minutes after janice,and overtook her in 20 minutes. if tom drove at a speed of 90mph,what was janice's speed in mph This exact question was asked & answered previously: http://www.answerbag.com/q_view/1469592

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Assuming a dinky burger and fries won't do it, what's the happiest meal you ever had? Deep-dish Chicago style pizza -- preferably in Chicago!

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How come you smell a skunk like 10 seconds after you drive by it? The smell is already in the air over the road. When you drive through the smell, the molecules of skunk scent (mercaptans, etc.) have to diffuse into the air within the passenger compartment and then through your nasal passages before they register a smell within your olfactory system. This typically takes several seconds even if the smell is strong. It might be speeded by having the windows...

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Does anyone know what an optic system is, and can anyone present a picture? "Optic system" is a very general term for a system in which light passes through some combination of mirrors, prisms, lenses, or other optical devices capable of affecting the path of light rays, which determines how an image is formed. Not sure what you mean by "present a picture."

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Do you know what an Equinox is & why it occurs? The Earth's axis is tilted 23.5 degrees relative to the plane in which it revolves around the sun (the ecliptic plane). This explains the seasons. The equinoxes are the two opposite points in the Earth's orbit, occurring 6 months apart, when the axis is neither tilted toward nor away from the sun. This occurs in the spring (vernal equinox) and autumn (autumnal equinox). During...

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Differentiate controlled set up from experimental set up Do you mean CONTROL or CONTROLLED -- different things. If an experimental setup is scientifically controlled, it means that there's an independent variable that can be manipulated or changed by the experimenter, along with a control group in which that variable is not changed. Thus you can tell if the outcomes are different between the experimental and control groups. Without the...

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Can you breathe out of your nose and out of your mouth at the same time? Yes. You breathe entirely with your mouth when your soft palate closes off the nasal passages. You breathe entirely with your nose when you close your mouth. Otherwise you breathe through both.

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What is the derivation of the symbol "I" for electric current? It was used by French scientist Ampere (after whom the unit of current is named) for the french word "intensite" (meaning intensity). Sorry no accent marks.

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What verbal phrases are used to indicate an inequality? "Greater than", "more than", "greater than or equal to", "less than", etc.

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How do I insulate a magnet? I have to carry a magnet and would like to protect my credit cards. Shielding from magnetic fields is not as easy as it is for electric fields. Try surrounding the magent by soft iron or other ferromagnetic material. Most credit cards, however, need really strong magnetic fields (powerful magnets or very close proximity) to get erased or corrupted.

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Is our brain smart enough to understand the brain? Yes and no. Obviously research in neurosciences has advanced tremendously to the point that we understand the workings of the brain in great detail. This is true at all scales, from molecular biology -- to describe how neurons function and signal each other via synapses mediated by neurotransmitters -- to functional MRI to describe how different macroscopic regions of the brain participate in...

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If you are debugging a program while it is running, are you performing a dynamic analysis or a Fourier analysis? Fourier analysis is a specific mathematical technique for analyzing a waveform by breaking it into component frequencies. This doesn't fit the description of debugging a program while it's running.

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Is riding a bike over lots of incline a good way to burn off love handles? "Spot toning" involves exercising specific muscles to improves strength and tone. It works and is scientifically sound. "Spot reducing", however, is a myth. Losing weight by burning fat cannot be directed to any specific part of the body. Love handles (fat around the abdominal girth) will disappear when your body loses fat in general. There are no exercises that can...

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By which mechanism can a cell transport a substance from a lower to a higher concentration? It takes energy to move a substance against a concentration gradient. Energy-dependent mechanisms are known as 'active transport' and generally involve specific transport molecules embedded in membranes. They can change conformation (shape) after binding to the substrate in question -- expending energy in the process. In effect, pumping the substance into or out of the cell.

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How can fungi cause respiratory tract ingections? Some fungi are human pathogens and can thrive in the respiratory tract, where they induce inflammation and threaten the health of the host. This is especially seen in immuno-compromised patients, but can occur in anyone. Usually the infections are colonies of single-celled organisms or their spores. The general term for a fungal infection is 'mycosis'.

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Function of a fine adjustment of a microscope? Fine focus -- besides bringing an image into sharp focus it allows some degree of selection of different features lying in different planes through the thickness of the specimen -- different layers of cells, for instance.

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What is the difference between formaldehyde gas and free formaldehyde? Formaldehyde (CH2O) is a colorless gas. Most often, however, it is used in aqueous solutions (i.e., dissolved in water) in which case it is called FORMALIN. It is the simplest of the aldehydes and has been detected in outer space. http://en.wikipedia.org/wiki/Formaldehyde

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How many (5-card) hands are there that give you a full house? A full house consists of 3 of a kind and 2 of a (different) kind. The 3 of a kind can be any of 13 ranks. The 2 of a kind can be any of the 12 remaining ranks. That makes 13*12 = 156 different hands. [Added correction] But wait! The 3 of a kind represents 3 out of 4 suits, leaving any of 4 suits not represented. The 2 of a kind, similarly, represents 2 out of 4 suits, which may occur 6...

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If a couple wanted to have a baby, and the man drinks and smokes a lot,don't work and a bit overweight, would this effect her risk of getting pregnant? I'm not sure that smoking, drinking, and obesity necessarily decrease a man's fertility measured by sperm count, sperm motility, etc. I'd do a Google search for factors affecting male fertility. Besides fertility there's also the issue of damaged or abnormal sperm, i.e., increased risk of birth defects. Again a search of medical literature can probably give an answer.

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What do you think about the expression: “If you’re not compatible with your partnership will never work”? Besides being grammatically incorrect, it doesn't really say anything. Did you mean, "If you're not compatible with your partner, the partnership will never work." ? If so, it's basically a tautology: Partnerships that 'work' are the ones where partners are 'compatible' and vice-versa.

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What is the approximate length of blood vessels in the body? It's probably several miles, at least, if you count all the capillaries. The branching structure of blood vessels is best described by fractal geometry, in which the total length could be infinite despite being packed into a finite volume. In reality, however, blood vessels can get no smaller than capillaries so the branching doesn't continue forever.

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What is something unique to have at a party Live music. Chocolate fondu.

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Last week, I was told to go home from work because I had a cold and some staff were worried that I may infect the office (besides they are all scared with the swine flu thing). Is that fair? You can usually tell the difference between an ordinary cold (runny nose, sore throat, etc.) and influenza (fever, cough, aches & pains, & sicker than an ordinary cold). If it's flu (seasonal or Swine) then you should stay home until you're getting better. Flu may be highly contagious by airborne droplets from your respiratory tract. If it's just a cold you can...

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What are Tissues where lymphocytes congregate as they cleanse the blood of foreign materials called The lymphatic or lymphoid system consists mostly of lymph nodes scattered around the body, plus the spleen and portions of a few other organs.

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Question: to what degree does water ionize? a.completely b.to a large extent c.slightly d.not at all Slightly. Water ionizes to H+ and OH-. The pH of water is 7, which means that the concentration of H+ (and therefore OH- as well) is 10^-7.

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As distant galaxies recede from our galaxy, are they decelerating or accelerating? The startling discovery made only in 1998 is that the expansion of the universe appears to be accelerating. Distant galaxies are accelerating away from us and from each other.

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If we pass a light at the region where black hole gravitational force balances pauli's exclusion repulsion,what would hapen 2 it? I don't know, but here's more info on such a region & a link: " Electron degeneracy pressure is a consequence of the Pauli exclusion principle, which states that two fermions cannot occupy the same quantum state at the same time. The force provided by this pressure sets a limit on how much matter can be squeezed together without it collapsing into a neutron star or black...

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Have the scientists that built the big hallogen collider underneath the france/spain border had a go of their new toy yet, or is it still being fixed or built? The Large Hadron Collider (LHC) at CERN in Europe was started up last fall, but had a failure during testing (a short circuit led to a helium leak that caused some of the giant magnets to 'quench' -- ripping them from a concrete floor as magnetic energy rapidly converted to heat. They got as far as sending proton beams around the rings, but not yet colliding. Meanwhile LHC has to...

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Does our solar system have name? "The Solar System" -- key word here is definite article 'The'. Systems formed around stars other than the Sun (which is sometimes referred to by its Latin name Sol) are named for their star.

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Can you prove evolution or not? Any evidence? Is there really a missing link? Evolution by natural selection (as an explanation of biological diversity) is as robust and strongly supported as any scientific theory can be. (Science never claims to have 'proof' of anything.) Darwinian evolution is supported by mountains of evidence -- from the fossil record to comparative anatomy to genetics to direct DNA sequencing. In the words of one famous scientist...

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Explain what is occuring during the process of evaporation, in terms of particles and the kinetic theory It takes a certain amount of extra energy for a molecule of liquid to enter the gas phase. Only the most energetic ones make it, leaving behind a liquid with less energetic molecules than before -- i.e., colder (evaporative cooling).

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What is the most ridiculous thing you have ever heard of? The Earth is only 6000 years old.

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What is a steriod? A common misspelling of STEROID, which is described here: http://en.wikipedia.org/wiki/Steroid

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Why do soft drinks have a low ph? It's the fizz. Dissolved carbon dioxide makes carbonic acid, which causes a low pH.

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What is something a Humpback Whale can do that an Ant can't do? (or vise versa) Swim.

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What is a tessellation Literally, 'tiling'. Usually it means fitting geometric shapes, such as polygons, together to cover a surface with no gaps or overlaps.

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What is the difference between a gamma ray and an x ray? They're both high-energy electromagnetic radiation -- or high-energy photons, if you prefer. Gamma rays have more energy than x-rays and stand at the top of the spectrum -- all photons above a certain energy are called gamma rays.

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Is Earth really does have a ring? Does Earth have a ring? No -- there's certainly no observational evidence of it.

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Can you give some interesting facts on the periodic table for a chemistry project for me and my freind alizee?? x I can give you some facts. Whether they're interesting is not for me to say...:) The invention of the periodic table is credited to Russian chemist Dmitri Mendeleev in 1869. Mendeleev intended the table to illustrate recurring ("periodic") trends in the properties of the elements. The layout of the table has been refined and extended over time, as new elements have been...

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Are you excited about the newest batch of genetically-engineered child stars, soon to be unveiled by the Disney Co.? ; ) (Video with more info enclosed). I don't get too excited about any stories that appear in the Onion -- which is a parody of news.

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Is depression pride in reverse? The opposite of pride -- if there is such a thing -- would be embarrassment or low self-esteem. Such a feeling might be associated with depression but not necessarily. Depression is more complicated than that -- usually with some component of feeling helpless.

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What do you believe after this life? Do you believe we are reunited with loved ones? Unfortunately not. I have a naturalistic world view -- I don't hold any supernatural beliefs for which physical evidence is lacking. I regard death as the permanent end of existence -- "When you're dead you're dead." I used to find that depressing but I've changed my view: it makes life seem very precious and affirms that it's a privilege just to be alive....

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Why does water make you go pee alot? That's one of the kidney's main functions: regulating the water content of the body. Drink too much and the kidneys make more urine. Get dehydrated and the opposite occurs.

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Can you provide us with a proof of your favorite theorem? One of my favorites is the ancient proof that the square root of two is irrational -- it cannot be expressed as the ratio of any two integers. The proof is by 'reductio ad abusrdum' -- proof by contradiction. Assume the opposite & show that it leads to a contradiction. Let r = square root of 2. Assume that r = m/n where m and n are integers with no common factors. Then...

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Is there scientific explanation as to why the sky is blue? Certainly -- it's known as Rayleigh scattering. Sunlight is a mixture of wavelengths of light. The shorter wavelengths (mainly blue) are scattered in all directions by air molecules while the longer wavelengths are not. So we perceive the sky to be blue because blue light reaches our eyes from every direction in the sky, while the other wavelengths are seen to be coming directly from the sun.

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What is the first law ( formula, system) from which creating of our World begin? If by 'our world' you mean the Earth: it formed with the rest of the solar system by gravitational clumping of dust & gas -- so it was subject to Newton's laws of motion plus Newton's law of universal gravitation. If by 'our world' you mean the entire universe: The Standard Model explains what happened starting about one trillionth of a second after the big...

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What is the science of classifying living things? Taxonomy.

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What are the seven classification categories from most general to most specific? kingdom, phylum, class, order, family, genus, species But now there's an 8th level higher than kingdom: DOMAIN which includes bacteria, archaeobacteria, and eukaryotes. The latter domain contains the plant, animal, and fungi kingdoms. Also there may be intermediate levels, such as superorder, subfamily, etc.

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You are traveling 80 km/h in your car when you throw a ball 50 km/h. What is the ball's apparent speed to a person standing by the road when the ball is thrown sideways Assuming the ball's is thrown at right angles to the direction of your car's travel, and ignoring air resistance (assume the ball is thrown inside the car) then the final velocity is the vector sum of the two given velocities. Using the Pythagorean theorem, the final speed (magnitude of velocity) is square root of (80^2 + 50^2) = 94.3 km/h

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How much of our brain do we use on average?is this spread over the whole brain or concentrated to one spot?what does the rest of the brain do? You use all of your brain all of the time. The "10%" figure that people talk about is actually a just a metaphor for how we all have a capacity to learn more and think more clearly. There are subtle differences, however, in the activity of various parts of the brain with different kinds of mental tasks, as revealed in recent years with functional MRI and other methods of study. But...

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Proteins are polymers of (blank) monomers? Amino acid.

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Is there an anagram of once again? "Cage an ion" -- must be referring to buckminsterfullerine ! "A nag on ice" -- preserving an old horse ? Find your own: http://www.wordsmith.org/anagram/index.html

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Suppose z is a continuous random variable with a standard normal distribution and P(z<a)=.7140. 1. What is P(z>a) 2. What is P(0<z<a) I think I can answer these without actually knowing much statistics theory: (1) The total probability must be 1. Since (z<a) and (z>1) are mutually exclusive and exhaustive of all possibilities, it must be that their sum is 1. So P(z<a) = 1 - .7140 = .2860. (2) In a standard normal distribution there is symmetry w/ respect to the z axis. The probabilities P(z<0) and P(z>0)...

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Which horizon is losing constellations at 11 p.m. today? I think pretty much everything in the heavens rises in the east and sets in the west. With the solstice just 2-3 weeks off, the constellations will disappear almost due west. I don't think the time of night matters.

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Why is it when your 6, they call it an imaginary friend; but when your 26 they call you a schizophrenic? ...when you're 26 they call you a religious believer! I gave up imaginary friends when I was 4.

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Has a nerve translator been invented? That map uploads sensory data from animals. No.

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Mathematicians, I think that .999999... (infinite 9s) is equivalent to 1.0. Do you agree? Yes. Mathematicians say that an infinite sequence of 9's after the decimal point -- or notation to indicate such -- is equal and equivalent to the real number that we call 1 -- just two names for the same number. One of them is much more complicated to write down than the other.

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Can photosynthesis be simulated in labs? So if you take some CO2 plus water you get carbohydrates and oxygen? Is that even possible? No. Photosynthesis depends on chlorophyll pigments and a whole chain of metabolic reactions in the living plant cell to support the capture of chemical energy from sunlight. It's a very complex process with details still being investigated.

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Without much oxygenation,does the smell of a fart eventually go away,or does your nose just get used to it?* The smelly gases in farts just diffuse away and get diluted with room air, making the smell go away. Oxygen has nothing to do with it. Your sense of smell can adapt to noxious ordors to some extent, but the bad smell still really goes away.

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What is the total number of hydrogen atoms in the represented formula C6H10(OH)6? 10 + 6 = 16

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In what period did the first vertebrates appear? In the early Cambrian period, some 525 million years ago. This was part of the so-called Cambrian explosion -- the 'big bang of biology' -- during which many diverse phyla and body plans of multicellular organisms emerged in a relatively short time.

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A jar has 6 red marbles and 4 blue marbles. you randomly choose two marbles. find the probability that both marbles are red The chance of picking a red marble first is 6/10. After doing so, there are 5 red marbles remaining among 9 total. So the chance of picking a red marble second is 5/9. The probability of both events is therefore (6/10)(5/9) = 30/90 = 1/3

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What is the difference between benign and carcinoma in situ? Benign means non-malignant = non-cancerous. The cells have no potential to spread as cancer. Carcinoma in situ = cancerous cells that have not yet migrated away from their original location -- but have the potential to do so if not removed soon.

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Draw a velocity-time graph for a ball that has been thrown straight up into the air. (Neglect air resisitance) It's a straight line cutting the time axis when the ball is at its apex.

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When and where did life begin? On Earth, at least 3 billion years ago.

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A ball is dropped from a roof and takes 3.00 seconds to reach the ground. How tall is the building? D = (1/2)*a*t^2 where a = acceleration & t = time a = 9.8 m/sec^2 t = 3.00 D = 44 m This is assuming no air resistance to slow the ball. Otherwise the building is actually shorter, but impossible to calculate without knowing the ball's detailed aerodynamics.

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The domestic Robot era never happened after all, did it? Not yet. Robotics and artificial intelligence will have to be WAY better than they are now -- give it another 50 years. Then robots assisting people will be as indispensable as things today like cars, phones, lamps, ...

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Could the very prescence of light in the observable universe, be contributing to the expansion of it? Once all the stars in this universe' incarnation (I beleive it happens many times over) are extinct, might this be when the 'big crunch' could occur? Light exerts a tiny pressure but not enough to overcome gravitation (attraction) or 'dark energy' (anti-gravity). Here's a book excerpt...

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What does this mean? Qadi Zada's(Mathematician) most original work was a computation of sin 1� with remarkable accuracy. Unfortunately the typographical character following 'sin 1' in your question does not render on my computer -- I can't see the whole statement. It's always remarkable that ancient mathematicians -- starting w/ Archimedes & Pythagoras -- were able to calculate certain numbers such as pi before they yielded to 'modern' analysis (last 300 years) and of course...

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What would the "super laser" created in California be used for? The National Ignition Facility -- an experimental lab (the size of a football stadium) that's the latest attempt at nuclear fusion. The trick is to get more energy out than you put in -- so called nuclear ignition -- which would be the first step toward the dream of practically limitless clean energy from the deuterium in seawater (one bucket could power a city for a year). Of course...

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Have you ever eaten at Fuddrukers?I'm going there for the first time tonight. Highly recommended.

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How do i keep a dinosaur bone preserved? I doubt there are any actual dinosaur bones -- just fossils, which are mineralized replacements of what used to be bones. Being made of rock minerals, they need no preservation.

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How far are we away from Star Wars technology? Assuming any of it is even possible, it's completely unthinkable and out of reach with today's physics and engineering.

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Why are cockroaches under the beetle category? They are not even in the same subclass. Cockroaches are not classified as beetles. All insects belong to phylum Arthropoda, class Insecta, then subdivided by order. Beetles comprise order Coleoptera which is subdivided into a huge number of families, genera & species, perhaps the most diverse order in the animal kingdom. Cockroaches, however, have their own distinct order, Blattaria, with most household roaches belonging...

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A stick of dynamite blows a boulder into 4 pieces. The boulder was stationary before the explosion, three of the pieces have the following momentum. What is the mass of the missing piece with a velocity of 25.00 m/s. PIECE A Piece B Piece C 10.0 M/S W 20. Conservation of momentum: Before the explosion there is zero momentum with everything at rest. Afterward the vector sum of the debris must still be zero.

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When an electron is emitted from an excited atom, where exactly does the electron originate from, the energy levels or the electron itself, and at what time does it get emitted during the transition of the electron? Well, it's a quantum phenomenon so there's going to be some weirdness. But basically the emitted electron is the same particle that previously was bound to the atom's nucleus. Freed by sufficient energy to overcome its binding potential, it now leaves behind an ionized atom carrying a positive charge. The timing question is harder and probably involves calculations of...

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I have an 0.84 chance of seeing a shooting star in an hour. What is my chance of seeing one in a half an hour? What is the chance of seeing one in two hours? Let's start with 2 hours. Let p = 0.84 = probability of seeing a shooting star (ss) in 1 hour. Then q = 1-p = 0.16 = probability of NOT seeing ss in 1 hour. q^2 = 0.0256 = probability of NOT seeing ss in 2 hours (not in 1st hour AND not in 2nd hour). The probability of ss in 2 hours = 1-q^2 = 0.9744 (in two consecutive periods, the probability goes from 84% to 97%). Note that...

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Is Recent Swine Flu outbreak is considered as food-borne illness or others ? Please explain. Certainly not. You don't get the disease by eating pork. It's passed like any strain of flu from human to human by coughing, etc. Like most human diseases (including measles, mumps, tuberculosis, etc.) it started in animals and then mutated to jump to humans. Swine flu started in swine.

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What is the division of the nervous system that connects the brain and spinal cord to the body's sense receptors, muscles, and glands? The peripheral nervous system. Brain & spinal cord are the central nervous system.

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What are the cube roots of 1{unity}? Since number theory deals only with integers, the answer would be 1 (only). In complex analysis, 1 has three distinct cube roots: 1 (-sqrt(3) + i) / 2 (-sqrt(3) - i) / 2 where sqrt(3) = square root of 3 and i = sqrt(-1)

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Loudness is realated to a sounds what? Intensity or amplitude.

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Why do variations in generation time exist among different species of microorganisms and within a single microbial species? You're asking about the mystery of biological aging -- spanning the range from unicellular microbes to large multi-cellular organisms. Exactly how cells are programmed to die after a period of time (seen in bacteria, trees, people, etc.) is unknown -- but plenty of active, ongoing research. Large animals are capable of bearing only a few offspring at a time, so their generation...

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Why must a loop be cool before touching it to a culture?Should you set it down to let it cool? How do you determine when it is cool? You want to use the loop to transfer bacteria from one dish to another. You don't want to incinerate them & you don't want to pick up stray bacteria from a foreign surface. You can determine when the loop has cooled by touching it to the edge of the culture medium & seeing if it sizzles? You could probably determine a safe number of seconds to wait after it stops glowing...

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Does women have more blood in their bodies than men?women do lose lots of blood every month and men dont? Women of child-bearing age tend to run lower hematocrits (red blood cell concentrations) than men, due to losses through menses. The blood volume is proportional to body weight -- not appreciably different between a man & woman of the same weight.

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Sometimes i can feel my stomach jump or like something is pushing it from the inside and i can sometimes feel something like a heartbeat in my stomach. WHAT COULD THIS BE? Probably fasciculations (twitches) of your abdominal muscles. Normal & nothing to worry about.

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What would fire look like in the absence of gravity? How does a flame behave in zero gravity? - Scientific American: http://www.scientificamerican.com/article.cfm?id=how-does-a-flame-behave-i The article says that flames tend to self-extinguish because the lack of buoyancy and convection in zero gravity allows products of combustion to accumulate around the flame, starving it of oxygen.

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Do maggots have eyes? Here's an answer I found with a Google search (MadSci.org): http://www.madsci.org/posts/archives/2002-03/1017165076.Gb.r.html " In fact little is known about the light-sensitive organs (photoreceptors) of maggots. This is in stark contrast to the photoreceptors in the compound eyes of adult flies, which are one of the most thoroughly studied systems in insect physiology. It has...

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What weighs more, a pound of feathers or a pound of gold? Feathers. The dumb answer is gold because it's denser. The sucker answer is they weigh the same because a pound is a pound (which is usually true). Gold, however, & other precious metals are measured in Troy ounces & pounds. Troy pounds are lighter than ordinary avoirdupois pounds. A pound of gold (12 Troy ounces) = approx. 373 grams. A pound of feathers (16 avoirdupois...

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Geez! How many of those have you had so far?! Shix or sheven...

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Is sexism inherent in biology? Undoubtedly. Given our sexual dimorphism (men are larger & more muscular), our cognitive / emotional / behavioral differences that appear to be inherited rather than learned, plus differences in reproductive & child-rearing roles (females couldn't, say, join the hunt while pregnant or with an infant) there is no denying a lack of symmetry or parity between men & women. The...

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What is at the end of a bone before a joint? Articular cartilage.

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How many balloons would I need to hold in order to start flying? One, if it's big enough. If you mean helium-filled toy balloons (rubber or Mylar) I don't think they can lift even a pound each. So you'd need many hundreds.

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Is the rule-of-thumb about "one car length for every 10 mph" consistent with the physics? That's an old rule that's no good because (1) it's very difficult to estimate car lengths while moving; and (2) it doesn't provide enough room anyway. A better rule is to measure your following distance in *time*. 2 seconds is commonly heard. An even better (safer) rule is 3 seconds. Let's say a car length is 18 feet. At 60 mph you cover 88 feet per second. So 6...

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Can we extend time? How? It's hard to answer without knowing exactly what you mean by 'extend'. According to Einstein you can take a high-speed trip (at near light speed) of short duration while centuries might have passed on Earth upon your return (the 'Twin Paradox' -- which is valid and not actually a paradox). The high gravitation just outside the event horizon of a black hole will...

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Why do horse flies bite people? Do they drink our blood or are they just jerks? Horse flies evolved to feed on mammals long before humans existed. Most mammals have thick or furry skin. Humans are easy targets. Here's what Wikipedia says: http://en.wikipedia.org/wiki/Horse_Flies#Diet " Most female horse flies feed on mammal blood...The bite from a larger specimen is extremely painful, especially considering the light, agile, and airborne nature of the fly....

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Could you please explain, why using differences in genotype of two species can be used to estimate the time at which they separated from a common ancestor; the so-called molecular clock. Mutations are like radioactivity -- it's a random process that nonetheless occurs at a predictable rate over long periods of time. So by determining the number of changed DNA base pairs between the same gene of two different species, you can estimate how much time must have passed since they were the same.

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Anyone reading ever used a rotary dial payphone, if so what did a local call cost? My first memory of pay phones was 10 cents. Later I remember it went to 15 cents (& when I put in a quarter I expected 10 cents change -- like a vending machine -- wrong!) Later, during my days of youthful indiscretion :), I learned how to fiddle with the wires to get ALL your money back on long distance calls!

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What are the Antennae Galaxies? A pair of colliding galaxies (first discovered in 1785). Wikipedia: http://en.wikipedia.org/wiki/Antennae_Galaxies " ...these two galaxies are known as the 'Antennae' because the two long tails of stars, gas and dust thrown out of the galaxies as a result of the collision resemble the antennae of an insect."

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Middle spring special. Apart from letters in speak softly, name something of which there are eleven. Men on a football team (American football).

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Little Survey here; Who believes Extra-terrestrial life is among us and visits us freely? There is no credible scientific evidence of alien visitation -- none, zero, zilch, nada... People tend to confuse this question with whether or not life EXISTS elsewhere in the universe, especially intelligent technological civilizations. Most scientists consider this to highly plausible, given the vastness and age of the universe, even though we have no evidence of it and no reason to...

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Thank you for help with my question"can,(by distructive interference)echo in a room be reduced by using speakers which transmit unhearable frequencies?" but i wondered about frequencies just borderline of human audibility(20,000Hz + )?or what alternative Destructive interference is relatively easy with long wavelengths because you can arrange for the phases to be 180 degrees opposite. At the high end of the audible range the wavelengths are less than 1 inch -- so it's difficult to get perfect phase inversion to cancel things out. When many frequencies are involved (as is typical) it would be very difficult. Even noise-canceling...

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I have a Motorola razr. I followed the instructions and e-mailed it. It said it was sent but is not showing up in my e-mail. Suggestions? Did you check your junk mail / spam ? You might have to tell your email browser that the sender (your phone) is safe.

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A Local train leaves a station and runs at an average rate of 35 mph. An hr and a half later an Express train leaves the station and travels at an average rate of 56 mph on a parllel track. How many hrs after it starts will the Express overtake the Local? You can set it up like this: Let T = time for express train to overtake local train, in hours. When one overtakes the other the distances from the station are equal. Distance = (speed)*(time) So (35 mph)*(T + 1.5 hrs) = (56 mph)*(T hrs) Good luck working it out!

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What are the six main time zones? There are 24 time zones in the world -- one per hour spaced roughly 15 degrees of longitude apart. For the U.S., the 'lower 48' spans 4 time zones (Eastern, Central, Mountain, & Pacific) plus Alaska & Hawaii have their own as well (Alaska more than one, I think).

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Can,(by distructive interference)echo in a room be reduced by using speakers which transmit unhearable frequencies? I don't think so. If the reverberation is in the audible range then you would need similar frequencies to destructively interfere with them. This is how noise-canceling headphones work -- they pick up extraneous sound, invert it, and mix it back with the audio signal to cancel the noise. A similar trick can be done with speakers -- I have an old stereo pre-amp made by Carver with a...

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Frankenstein's monster is not a myth but a pure fictional literary character. Why is it under the science and paranormal category? Why, indeed is 'Paranormal Phenomena' under Science? http://www.answerbag.com/q_view/387802

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Why is 0/0 is undefined? Division by zero is undefined.

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Is it cheaper to leave a 100watt light bulb on for 2 hours instead of turning it off and back on again will this use more energy? There's an old urban legend that light bulbs consume an inordinate amount of electricity during the brief instants when they are switched on or off. This is false. Better to turn off the light & save the 0.2 KWH (in your scenario). Old light bulbs, however, tend to finally *burn out* when first switched on because of cold-filament inrush current. When this happens it still consumes...

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What is something that you learn in 2nd grade, use the dictionary, 5 syllables, 10 letters and ends in Y? Vocabulary.

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What happened in the middle of the twentieth century that will not happen again for 4,000 years? 1961 was an upside-down year: It reads the same if you rotate it 180 degrees. The next won't occur until 6009.

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Riddle: What fruit do we get from the electric plant? Currants (currents).

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In a primitive environment, what would naturally eat humans? (excluding detritivores and saprotrophs) Lions, tigers, bears, crocodiles... Any predator that routinely hunts animals as large or larger than humans.

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Find the value of c that makes n2+20n+c The value c = 100 makes the expression (n^2 + 20n + c) equal a perfect square -- is that what you are asking?

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Is it possible to recreate a human being through collecting dead human parts and reconstructing it just like in the novel Frankenstein? If not, why? (educated suggestions would be nice) When somebody dies, every single cell in their body is oxygen-starved within 5-10 minutes after respiration and circulation cease. Brain, heart, kidneys, and other energy-dependent vital organs are the first to go -- within minutes. They can't ever be 'revived' because all the nucleic acids, proteins, membranes, etc. have begun to come apart at the molecular level and the cells...

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I need help with my science homework! The question is : If bacteria are present in a water of food sample, does that mean a disease? Explain. I know it means that a disease is not present but idk how to explain and back up my answer. I think the basic idea is that there are many kinds of bacteria but only a few kinds cause disease -- most are harmless and some are even helpful. Microbes that cause disease are called pathogens. Water and food samples will always have bacteria present (unless they've been sterilized) but hopefully not pathogens.

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What does ontogeny recapitulate? "Ontogeny recapitulates phylogeny": Haeckel's Law. It's a 19th century theory of embryology largely discredited by modern evolutionary developmental biology.

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Have you ever solved a Rubix Cube? If so, how long did it take you to solve? and when did you get it? I learned in the early 1980s when Rubik's Cube first hit the market. There were tons of little booklets for sale on how to solve the cube. I bought 2 of them & found that one book had easier methods while the other had a better notation for describing sequences of moves -- known as subroutines, like in computer programming. So I transcribed one book's steps using the other...

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What's the point of the big 'accelerator thing' in Cern Switzerland, how will it tell us about the beginning of the universe? According to Einstein mass and energy are inter-convertible. A particle's mass is usually expressed in units of energy. The standard model and other theories predict the possible existence of certain massive particles. These particle could be produced in high-energy collisions between ordinary protons -- if they are given huge kinetic energies by clever (& expensive!) design -- to...

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Tom drove away from bigtown 10 minutes after janice,and overtook her in 20 minutes. if tom drove at a speed of 90mph,what was janice's speed in mph When Tom overtakes Janice he's been driving for 20 minutes = 1/3 hour at 90 mph, covering 90/3 = 30 miles outside of Bigtown. Janice, meanwhile, has been driving for 30 minutes (1/2 hour) to cover those 30 miles, making her speed 30 / (1/2) = 60 mph = a mile a minute.

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Can someone explain to me how Ida the fossil constitutes the missing link in our evolution as human? It doesn't. Here's what noted evolutionary biologist PZ Myers said about Ida http://scienceblogs.com/pharyngula/ She's being called the "missing link in human evolution", which is annoying. The whole "missing link" category is a bit of journalistic trumpery: almost every fossil could be called a link, and it feeds the simplistic notion that there could be...

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The sum of two numbers x and y is less than 30 but greater than 10. graph all possible solutions. Graph the lines x + y = 30 and x + y = 10. Then figure out which side of each line the solution set lies in. Then take the intersection of the regions.

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Something you need but can't buy it yourself, they buy it for you and can never see it. What is it? Coffin.

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Do you remember a song that was popular in your early teens? The Beatles! Especially "I Want to Hold Your Hand".

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How many swear words do you know? All of them!

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How does the space shuttle takes off and land It launches like a rocket and lands by gliding to a runway.

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Why does it look like the space shuttle crew members are not moving at a high speed while they are making repairs to Hubble? If Hubble orbits Earth every 97 minutes, and the crew is traveling at that speed during a space walk, how do they appear to simply The telescope is also orbiting the earth. They match orbits.

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Eat a bag of_______? What? Popcorn Cheetos (for old-timers) Peanuts I'd say this is more INSIDE the bag :)

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What is the color of a rats heart In Science: Red In Entertainment: Black (if by rat you mean a self-interested betrayer or informant). Gold if it's a character like in 'Ratatouille'.

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Why do some countries have nuclear weapons? They have the wealth and technological infra-structure to develop the complex, expensive facilities for enriching uranium and developing bombs from it. The U.S. (with the Manhattan Project during WWII) invented nuclear weapons. As I understand it, the Soviets stole some of our secrets in the immediate post-war period. Thereafter a few countries developed the bomb on their own, knowing a few...

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Science,Earth-A motor coil when rotates,causes lot of noise, because of friction. We hear that sound through the medium air. Like that, When Earth rotates with the frictional Atmosphere, does it produce any sound? The atmosphere is part of earth and rotates with it. Carried around in airless space the atmosphere makes no sound. Nor does the earth make sound as it flies around the sun in its orbit. What we call wind, however, is the local movement of air relative to the earth's, which makes noise at the earths' surface by rustling trees, etc.

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The blood vessels that consist of a single layer of cells are the _____? A. capillaries B. arterioles C. venules D. lymphatics Capillaries.

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Who wrote, "Grow old along with me! The best is yet to be, The last of life, for which the first was made"? Robert Browning

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What is 0.25 is R of 4 Assuming that R is some number (ratio or fraction), and translating "of" as "multiplied by" (which usually works in problems like this) then the question can be written: 0.25 = R * 4 where you solve for R. Thus R = 0.25 / 4 = 1/16 = 0.0625

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When an infection such as appendicitis occurs, the number of ______? A. red blood cells increase B. red blood cells decrease C. white blood cells increase D. white blood cells decrease C. White blood cells are part of the immune system.

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Bovine spongiform encaphalopathy,a brain disease that became imminent in 1996,is caused by prion(an infectious protein).What in the protein rendered it infectious? We usually know infectious diseases i.e. SARS as to be caused by viruses/virulent bacteria. According to Wikipedia: http://en.wikipedia.org/wiki/Prion To date, all such agents that have been discovered propagate by transmitting a misfolded protein state; the protein does not itself self-replicate and the process is dependent on the presence of the polypeptide in the host organism. ... Although the identity and general properties of prions are now well understood, the mechanism of...

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How came lightning causes crackling on AM radio frequencies, but not on FM? For the same reason FM sounds better than AM. Lightning releases broadband radio frequency (RF) noise, easily picked up by your radio antenna, which adds the noise's voltage to the tuned-in carrier frequency. With AM radio the audio signal -- what you're supposed to hear -- is added to the carrier, modulating its amplitude (voltage). When RF noise is received from lightning, it...

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What is the difference between vertebrates or invertebrates? Vertebrates are animals with a backbone (a connected stack of bony segments, each called a vertebra -- plural: vertebrae). Vertebrates represent the majority of Chordates, which is a phylum of the animal kingdom -- a main category. Any animal other than a chordate is an invertebrate because it belongs to a different phylum (with a few exceptions such as lancets). Other phyla include...

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What is the best way to calm yourself down Try to picture yourself from the outside, as if you were watching a movie of yourself. See your behaviors and feelings as other, more detached, people might. (Doesn't always work!)

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What are some of the statistics that claim that the moon landing happened? Statistics -- do you mean documentation? For starters there are all the vast archives of daily newspapers & tv news broadcasts, etc. from that time -- a vast press corps -- along with NASA archives and other government documents that are (I would assume) not classified & readily accessible by the Freedom of Information Act, if not already published. There are audio and video recordings...

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Apart from letters in tablets, name something of which there are seven. Deadly sins.

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Have you ever seen a real UFO? Sure, I've seen plenty of unidentified flying objects in the day or night sky. Sometimes I can identify them later. Sometimes they just remain "unidentified." So what? No matter how many you identify, there is always some leftover residue of sightings that cannot be explained -- even though every time it CAN be explained it turns out to be very ordinary. In fact, some...

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Why is it so hot outside? According to your profile and my calendar: You live in the temperate zone of the northern hemisphere & you're asking the question in early May. Spring has sprung!

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Why is the moon white? It's actually gray because that's the color of most of the rock and dust (regolith) at its surface. If it were white instead of gray it would shine much brighter by reflecting more sunlight.

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What is your favorite sports team to never win a championship? The Chicago Cubs haven't won the World Series since 1908. They haven't even won the pennant since 1945. Does that count as never?

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What is the correct order for the hierarchy of biological organization Domain Kingdom Phylum Class Order Family Genus Species There may be intermediate levels such as superorder or subfamily, etc. Some families may be subdivided into tribe before genus. Example: European Honeybee Domain = Eukaryotes Kingdom = Animals Phylum = Arthropods Class = Insects Order = Hymenoptera Family = Apidae ( Tribe = Apini ) Genus = Apis Species = Mellifera

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Do chickens lay eggs by the dozen? Yes, but bakers' chickens lay 13.

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Can you describe stars in one word? Stellar!

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Is it theory or theorem? What's the difference? A theorem is a mathematical assertion that has been proven true using deductive logic, starting with given axioms / postulates. Theorems exist in the perfect, Platonic world of pure mathematics. The term theory has (at least) two very different meanings. In the everyday, casual sense a theory is a guess or hypothesis that has yet to be tested. "Who did that? I don't know, but...

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What color light is the combination of all primary colors? White.

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What is the most efficient way to convert gravitational to kinetic on a ramp? Efficiency is reduced by rolling friction and aerodynamic drag. Frictional losses can be minimized by making the ramp as short as possible -- which means making it as steep as possible, ideally vertical! Other factors in play are the roughness of the ramp surface (smoother is better), using wheels with minimal contact area (hard and thin), and designing the rolling / falling body to minimize...

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What is a material that has many free electrons Metal -- that's why it conducts electricity so well.

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A high pCO2 will produce what kind of pH? Respiratory acidosis = lower than normal pH.

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Can you expell brains through the nose? Doubtful. But with a basilar skull fracture, cerebro-spinal fluid (the fluid that surrounds the brain) can leak from the nose or ear.

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What amphibians do you raise in a "ranarium"? I've not seen that word before & I didn't look it up or google it. But I'm guessing frogs, given that a common species of frog has the genus name 'Rana'.

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What is "occums razor"? Named after William of Ockham, Ockham's Razor (aka Occam's Razor) is the philosophical principle that the simplest explanation tends to be the correct one. The 'razor' refers to cutting away the more complicated or contrived hypotheses so that only the simplest explanation remains. Also known as the principle of parsimony.

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Is the Earth infinite because we go around it and it never ends.. then why do we think the universe infinite? The universe is said to be 'finite but unbounded'. The simplest model is a 4-dimensional structure (hypersphere) analogous to the round Earth. In principle if you traveled far enough in a straight line (i.e., taking the same path as a beam of light) through the universe, you would return to your starting point.

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Is it possible these days for one who is blind to get new pair of eyes that was donated so it could be connected to the blind on who could possibly see again? Corneas (the outer transparent covering of the eye) are harvested from organ donors. These are used for cornea transplants for patients who are blind because of corneal disease. An entire eye cannot be transplanted because (among other reasons) the optic nerve cannot be reconnected. It would be on a par with a brain transplant -- pure science fiction at this stage in medical technology.

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When a nurse says that her vital signs are "tacky", what does that mean? It means tachycardic -- 'tachy' in medical slang -- meaning rapid heartbeat. Strictly speaking, heart rate greater than 100 beats per minute.

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What are two integers such that the square of the integer is 12 less than seven times the integer? x^2 = 7x - 12 x^2 - 7x + 12 = 0 (x-3)(x-4) = 0 x = 3 or x = 4 If you can't factor the expression, then use the quadratic formula to get the same answer.

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What feature of the structure of DNA makes it uniquely qualified to function as an information carrier? The fact that it is a linear string of bases, each of which may be chosen from a set of 4 different types without affecting the overall structure of the molecule. Thus DNA carries a digital code in the form of a unique string of bases. The fact that each base pairs up uniquely with another also enables replication with no loss of information.

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What is your favourite cellular automaton? Conway's game of 'Life'.

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What is the bio organic chemical makeup of homosapian feces About 90% of the dry weight is dead bacteria. Most of the rest is indigestible fiber.

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A model is made of a car. the car is 9 feet long and the model is 6 inches long. what is the ratio of the length of the car to the length of the model? 18.