Physics

Recent Answers

2009-11-21 Physics - Force and Gravity:

Hello Shameem, Thanks for your reply. I think I understand your question now. As you mentioned yourself, while the earth orbits the sun, the gravitational potential energy may decrease while it

2009-11-21 Physics - quantum physics:

Quantum mechanics bugs a lot of people, but it works fantastically well and it's stood up to nearly a century's worth of exhaustive testing. The principles of quantum mechanics that you state are highly

2009-11-21 Physics - dielectric:

Hello Sanaz, Sorry for not getting back to you, I've been very busy lately. The truth is, finding the frequency is the hardest part because it involves solving a second-order differential equation

2009-11-21 Physics - How many times the power would a sprinter have to produce to run ten times as fast?:

You are, of course, assuming that air resistance is the main resistance to a runner's motion. At those speeds, it would indeed be significant, but you're comparing using the assumption that at human speeds

2009-11-19 Physics - the "why exactly so?" for the nature of the gravitational force:

Nobody knows the mechanism. It's just a fundamental property of mass that there's an attractive force between any two masses. For two small masses the magnitude of the force can be hard to measure.