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Conservation Of Momentum In A Rotating Black Hole Candidate

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Posted by An English major on June 8, 2000 10:35:35 UTC

Most of us has done the little experiment where we are rotating on a stool and then we pull our arms in. Well, if you haven`t, you go faster when your arms are pulled toward you.
As you have probably guessed, my question is what happens to a stellar mass that is destined to be a black hole (for the sake of argument) which is rotating?
If you do the math, you find that a star doesn`t have to be going very fast at the outset for it`s rotational velocity to (mathematically) excede the speed of light as it collapses into a singularity.
What is the deal here, is this possible, and why don`t we find other collapsed objects (like neutron stars) that are rotating as rapidly as they should be?

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