Homework Help: physics

Posted by ashley on Friday, November 30, 2012 at 12:53pm.

A star the size of the sun has a mass 8 times as great. It rotates on its axis once every 12 days. It then collapses into a neutron star of radius 10km, losing three quarters of its mass in the process. How long does it take to rotate once after collapse? (it's spere though process, and the loss mass carries no angular momentum).

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