Physical sciences category

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Space and astronomy

Posted by RadioLogic some time ago

How long does it take for a radio signal to reach the International Space Station?

Posted by bostjan64 some time ago

Have you ever seen the northern lights?

Posted by bostjan64 some time ago

Would you be excited if you discovered extra-terrestrial flatulence?

Posted by Linda Joy some time ago

Often called high energy particles, what gives life to them?

Posted by bostjan64 some time ago

What planet did Percival Lowell discover?

Posted by Linda Joy some time ago

Who wrote President Roosevelt in 1939 proposing the feasibility of an atomic bomb?

Posted by Linda Joy some time ago

What planet travels around the sun every 248 years?

Posted by Linda Joy some time ago

How much trash do you throw away each week?

Posted by Fjorpagoda some time ago

To Work at NASA or a Space Agency what would be best? In your opinion.

Posted by jchapman10 some time ago

what is quantum mechanics?

Posted by Jawama some time ago

Determine which of the following does not enable enzyme-substrate complex formation. a. Dipole-dipole interactions b. Disulfide linkages c. Salt bridges d. Hydrogen bonds

Posted by Linda Joy some time ago

What constellation contains the twins Castor and Pollux?

Posted by 11stevo73 some time ago

Do you believe in this so called environmental disaster?

Posted by DancesWithWolves some time ago

Are these Shuttles as safe as they're made to be, they were going to launch one today and it was leaking fuel ?

Posted by Elwood some time ago

Why is water incompressible?

Posted by Linda Joy some time ago

Who do you think will be sponsoring the next rocket launch?

Posted by Linda Joy some time ago

Do you believe in destiny? Do you think probability wave functions disprove destiny?

Posted by Linda Joy some time ago

What travels faster than the speed of light?

Posted by Coco Rose some time ago

which percentage of people probably believe the moon landings were real? why many think they were faked?

Posted by Nicole Osborne some time ago

For the reaction: 2Fe + 3CuCl2 = 2FeCl3 + 3Cu. 10g of Fe and 18.0g of CuCl2 are mixed together and a reaction occurs.

Posted by DarkPoetry30 some time ago

How do you solve E=mc^2?

Posted by James Hartman some time ago

What keeps unarmed nuclear bombs from getting hot, since the nuclear rods in a nuclear reactor with a purity of 5% Uranium produce 5000 degrees of heat and the core of a nuclear bomb contains 93% pure Uranium 235?

Posted by Denmarks some time ago

Will there ever be a solution to the theory of everything?

Posted by Linda Joy some time ago

What does space sound like?

Posted by DancesWithWolves some time ago

What you think about , William Shatner going into space at age 90?

Posted by Linda Joy some time ago

How can such a tiny thing be such big news?! First time ever quantum entanglement in space!

Posted by Linda Joy some time ago

True or False: Massless particles don't experience time.

Posted by Linda Joy some time ago

Is it murder to kill time?

Posted by Zim1 some time ago

What are the three equations of static equilibrium?

Posted by JAniiilll some time ago

what is the si unit of work

Posted by Frank Bristol some time ago

If you stack one chair on top of another chair will it take double the weight ?

Posted by Linda Joy some time ago

What are your thoughts on the 'Giant Arc'?

Posted by Gabriela4678 some time ago

Two samples of cooper(II) sulfate solution with concentrations of 0.080M and 0.30M were analysed using a spectrophotometer. Which sample would show the strongest absorption of light? PLS HELP ME. Im dumb in Chem :)

Posted by PookieNumNums some time ago

How come sometimes when you lightly hit your head if feels like it's bleeding?

Posted by Yoza some time ago

How much the impact i will get if i gets hit by the whole water night tide. And i move as earth rotate with 1000 miles per hour.

Posted by Yoza some time ago

1 ton satelite and 0.5 ton satelite. If i want to put them on the same altitude. Should i set the same speed?

Posted by Zeljko some time ago

If all the things that make my consciousness as it is are recreated again neons of years from now, does that mean that I am going to be alive again. But shouldnt this mean that there are creatures that exist in more places at once?

Posted by Ali Fayyad some time ago

Knowing that the couple shown acts in a vertical plane. Determine the stress at point A and B

Posted by WorldOpenSkies2222 some time ago

Do you believe in extraterrestrials?

Posted by Shekainah Mae Centino some time ago

A +100 μC charge is placed at the origin. A -50 μC is placed at x=2m and a +200 μC is placed at x= -4m. What is the net electric force acting on the +100 μC charge?

Posted by Zim1 some time ago

Explain the difference between Direct Numerical Control and Distributed Numerical Control and show it by means of simple block diagrams.

Posted by Zim1 some time ago

What causes shear failure and member tear in riveted joints?

Posted by Zim1 some time ago

Define fatigue failure. What are its characteristics?

Posted by Zim1 some time ago

a) Why are washers used with fasteners? b) Which is the preferred key type used on tapered shafts and explain the reason for it?

Posted by Zim1 some time ago

Define factor of safety for brittle materials.

Posted by Zim1 some time ago

Is the yield point well defined in the case of brittle materials? Explain with reasons.

Posted by Zim1 some time ago

An object of mass 10 kg encounters a frictional force when sliding to the right. Given the coefficient of friction between the object and the surface is 0.15, determine: a) The normal force b) The gravitational force c) The frictional force Assume value of gravitaton constant g = 9.81m/s2

Posted by Zim1 some time ago

a) Explain the process of creep as applied to metals.

Posted by Zim1 some time ago

We have a plate of width 200 mm and thickness 12 mm. A tensile load of F = 210 is applied along the axis of this plate. a) Determine the tensile stress in the plate. b) Using a safety factor of 2, determine whether the plates will fail or not if the yield strength of the plate material is 270 MPa.

Posted by Arik Gitman some time ago

If Robin Hood applies a 15N force to pull his bow back by 0.25 m, with what speed will his 0.150 kg arrow leave the bow?

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