A star with mass 3.00 1030 kg and radius 1.50 109 m
Chapter 8, Problem 8.129(choose chapter or problem)
A star with mass 3.00 1030 kg and radius 1.50 109 m rotates on its axis at a rate of 0.010 0 rev/d. If the star suddenly collapses to a neutron star of radius 15.0 km, fi nd (a) the angular speed of the star and (b) the tangential speed of an indestructible astronaut standing on the equator.
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