# Jamie

College Sophomore

### g on Jupiter?

Determine the acceleration of gravity at the surface of Jupiter knowing that R=71492 km and that the period and radius of orbit of its moon Europa are t=3.551 days and r=670900 km.

1 AnswerPhysics11 months ago### Why can't the Universe be infinitely old?

8 AnswersAstronomy & Space6 years ago### Physics question about length contraction?

So I know if you're in spaceship traveling to a distance star at a speed near the speed of light the distance to the star contracts to make the trip shorter. My question is what if you look backwards in your spaceship? Does the space behind you contract, lengthen or stay the same?

3 AnswersPhysics6 years ago### Can there be an important relation between the speed of light and G?

If you multiply the speed of light and G, the universal gravitational constant you get 1/50. I find it interesting that the product is such a near perfect rational number.

1 AnswerPhysics6 years ago### Will the legitimate answers in the Astronomy Section stop answering the "god is the answer" people.?

In my opinion it shows more intelligence to ignore them than to try and reason with them. And besides I truly believe that receiving zero answers will drive them bonkers.

1 AnswerYahoo Answers6 years ago### Why is it significant that antiparticles have the same mass?

I mean if antiparticles annihilated each other because of the opposite charge than electron and protons would annihilate each other, so what's the other reason?

1 AnswerPhysics6 years ago### Physics question I asked earlier?

I asked this question earlier but I forgot part of the question so it couldn't be answered.

A 180 lb man stands at the end of a 1000lb boat. If the man jumps out of the boat with a speed of 10ft/s relative to the boat. In what direction and with what speed does the boat move.

2 AnswersPhysics7 years ago### Physics Problem: Man jumps off boat.?

A 180lb man jumps off the end of a stationary boat in water. If his speed is 10ft/s relative to the boat with want speed and in what direction does the boat move.

2 AnswersPhysics7 years ago### Help with physics projectile motion?

A projectile is launched at a angle of A from the top a cliff and distance H above sea level. If the projectile lands in the sea a distance D from the base of the cliff what is the maximum height reached above sea level by the projectile in terms of H, D, and A?

1 AnswerPhysics7 years ago