general relativity

Whatever you do, don't believe what V-bird is about to tell you. You'll fail for sure.I think 2 and 3 are true. I've never heard of 1 but I guess it could be true - on a planet twice the size of Earth but the same mass you'd feel less gravity at the surface.So, I guess it's all of the above?[This message has been edited by crashfrog, 03-30-2004]

But #2 is true, as well. Since there's no answer that's just 2 and 3, and the correct answer must be in there somewhere, we can conclude that the answer is 4 - all of the above.

In my grade school we had these spinner things, like one-man merry-go-rounds. When you leaned out, away from the center, the speed of rotation slowed dramatically. When you leaned in, bringing your mass closer to the center, the speed increase was enormous (for a 7-year-old.)I'm pretty sure the same principle applies here. As the neutron star contracts, it's mass moves closer to the center of rotation, so the speed of rotation increases.

And, also, relativity. All relativity does is add some additional terms to Newton's equations, I think.I guess what I'm saying is that 1 and 2 don't stop being true under relativity (as far as I know, which is not far), and can even be derived from relativity. I think you had a typo there. Quantum gravity is a different beast altogether.

What people need to be aware of is the fact that, in 134 posts, you've never been able to substantiate either of those claims.