[填空题]
Suppose a star the size of our m;is jb9n9pq(;yy8pq Sun, but with mass 89u+zsi4as-4xs ( aosb .0 times as great, were rotating at a speed of 1.0 revolution every 12 days. If it were to undergo gravitational collapse to a neutron stass 4 u9ao+x4bsa isz(-r of radius 11 km, losing three-quarters of its mass in the process, what would its rotation speed be? Assume that the star is a uniform sphere at all times, and that the lost mass carries off no angular momentum. $\times10^{9 }$ $rev/day$
Post time 2025-2-18 20:00:22
