Question: By what factor does the rotational kinetic energy change when the star in Problem 39 collapses to a neutron star? Problem 39 The angular velocity

By what factor does the rotational kinetic energy change when the star in Problem 39 collapses to a neutron star?

Problem 39

The angular velocity of a neutron star which has collapsed to a diameter of 16 km, from a star whose core radius was equal to that of Earth (6 × 106m) Assume its mass is 1.5 times that of the Sun, and that it rotated (like our Sun) about once a month

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