http://www.answerbag.com/profile/1155705 New Answerbag questions from Anonymous Mon, 28 May 2012 17:55:40 -0700 Mon, 28 May 2012 17:55:40 -0700 http://www.answerbag.com/q_view/1873870 Why does the vis viva equation, v^2=GM(1/r-2/a) give different velocities than v=SQRT(GM/r), and which is accurate? Thu, 24 Dec 2009 12:42:34 -0800 http://www.answerbag.com/q_view/1873870 http://www.answerbag.com/q_view/1873668 Using the vis viva equation appears to give inaccurate solutions. v^2=GM(2/r-1/a) The only time the solutions are correct is when a=r??? Wed, 23 Dec 2009 23:36:43 -0800 http://www.answerbag.com/q_view/1873668 http://www.answerbag.com/q_view/1857031 If our Sun were a black hole what would it's temperature be? Wed, 09 Dec 2009 22:40:23 -0800 http://www.answerbag.com/q_view/1857031 http://www.answerbag.com/q_view/1857013 Calculate the accelleration of the tides? Wed, 09 Dec 2009 22:18:19 -0800 http://www.answerbag.com/q_view/1857013 http://www.answerbag.com/q_view/1856580 How is the mass of the Sun determined? Wed, 09 Dec 2009 17:16:37 -0800 http://www.answerbag.com/q_view/1856580 http://www.answerbag.com/q_view/1855392 Comet tails show us radiation from the Sun is an appreciable force. Calculate the ratio of gravitational and radiation forces on a small particle of density 5000kg/m³. What size will the radiation force exceed the gravitational? Tue, 08 Dec 2009 22:59:09 -0800 http://www.answerbag.com/q_view/1855392 http://www.answerbag.com/q_view/1855373 A 5.5 Mev gamma ray is scattered at 60 degrees from an electron. In Mev, what is the energy of the scattered photon? Tue, 08 Dec 2009 22:43:12 -0800 http://www.answerbag.com/q_view/1855373 http://www.answerbag.com/q_view/1855334 At its peak, the Sun's spectrum is 484 nm, what is the surface temperature? Tue, 08 Dec 2009 22:22:16 -0800 http://www.answerbag.com/q_view/1855334 http://www.answerbag.com/q_view/1855330 At what speed is the kinetic energy of a particle equal to its rest energy? Tue, 08 Dec 2009 22:17:56 -0800 http://www.answerbag.com/q_view/1855330 http://www.answerbag.com/q_view/1854721 2 protons with energy 10 keV collide head on. Assuming non-relativistic speeds how close do they approach each other? Tue, 08 Dec 2009 14:29:54 -0800 http://www.answerbag.com/q_view/1854721 http://www.answerbag.com/q_view/1854716 What velocity must a particle of rest mass mand velocity v have if its momentum is 10mv? Tue, 08 Dec 2009 14:27:14 -0800 http://www.answerbag.com/q_view/1854716 http://www.answerbag.com/q_view/1854714 An electron with a rets mass of 9.11 x10E-31 kg is accellerated to an energy of 30x10E9eV(GeV). Kinetic energy? Momentum? Speed? Tue, 08 Dec 2009 14:25:43 -0800 http://www.answerbag.com/q_view/1854714 http://www.answerbag.com/q_view/1854710 A 200m (rest length) space craft passes by a satellite in 8us, what is its speed relative to the satelite? Tue, 08 Dec 2009 14:23:04 -0800 http://www.answerbag.com/q_view/1854710 http://www.answerbag.com/q_view/1854702 A satellite in low earth orbit experiences drag reducing mechanical energy, by how much does this slow down its orbit due to friction? Tue, 08 Dec 2009 14:18:44 -0800 http://www.answerbag.com/q_view/1854702 http://www.answerbag.com/q_view/1853251 Excluding wind resistance and such, which angle would yeild a further distance for an arrow fired at 124 mps, 30 degrees or 60 degrees? What are the differences in the parabolic arcs of these trajectories? Mon, 07 Dec 2009 18:03:18 -0800 http://www.answerbag.com/q_view/1853251 http://www.answerbag.com/q_view/1853244 A proton from rest falls through a potential difference of 25,000V, what speed does it gain? Mon, 07 Dec 2009 17:59:42 -0800 http://www.answerbag.com/q_view/1853244 http://www.answerbag.com/q_view/1853241 What is the maximum or burnout velocity of the Saturn V rocket whose mass was 2.45x10E6 kg, 65 percent of which is fuel, if the fuel exhaust velocity is 3400 ms? Exclude gravity and begin from rest. Mon, 07 Dec 2009 17:57:42 -0800 http://www.answerbag.com/q_view/1853241 http://www.answerbag.com/q_view/1853238 Aluminum rivets in airplanes are made larger than the holes they fit into and are cooled with dry ice before insertion to -78C. Warming to 23Cthey fit tighter what diameter should the rivet me made at 23C to be inserted into a 3.2 mm hole a=2.4E-5C-1 Mon, 07 Dec 2009 17:54:07 -0800 http://www.answerbag.com/q_view/1853238 http://www.answerbag.com/q_view/1853227 What is the activity of 1 gram of Cobalt 60 with a half life of 5.24 yrs? Mon, 07 Dec 2009 17:47:02 -0800 http://www.answerbag.com/q_view/1853227 http://www.answerbag.com/q_view/1853223 An Ice man was discovered with an activity of 14/6C Bq/g . How old is the iceman? Mon, 07 Dec 2009 17:42:58 -0800 http://www.answerbag.com/q_view/1853223 http://www.answerbag.com/q_view/1853206 A satelite ina circular orbit around Earth at a radius twice Earth's radius. 2Re.. How much energy is required to move it to an orbit of 4re or Four times earth's radius? Mon, 07 Dec 2009 17:32:07 -0800 http://www.answerbag.com/q_view/1853206 http://www.answerbag.com/q_view/1852175 The vis viva equation is designed to give a velocity for a specific portion of orbit. Why is it that if one uses periapsis for this point one obtains a value greater than the velocity calculated by other means for the same point in orbit? Mon, 07 Dec 2009 08:06:22 -0800 http://www.answerbag.com/q_view/1852175