? Part A A neutron star is the compact remnant of a very large star that has exp

Question

? Part A A neutron star is the compact remnant of a very large star that has exploded. Suppose that right after one such explosion, when much of the stars inertia has been blasted away, the star's remaining core has an inortia of 4 x 10 kg. a radius of 13 x 10*m, and completes one revolution every five days What is the new spin rate once the core gravitationally collapses into a neutron star of radius 19 km ? Assume negligible loss of inertia duning the collapse. Express your answer using two significant digits. times per second Submit Request Answer Provide Feedback Next>

Explanation / Answer

I1 w1 = I2 w2

new spin rate w2 = [I1 / I 2] * w1

= [M r12 / M r22] * w1

= [r1 / r2] 2 * w1

= [13 * 108/ 19 * 103] 2 * (1 rev / (5 * 24 * 60 * 60))

new spin rate = (1.08 * 104 ) times per seccond

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