[填空题]
Suppose a star the size of our Sun, but with pm*hu x12p b4/q1aeuwmass 8.0 times as greatnz: hk7* j/efv/- rqn8b:iwt8 ys /knql09wa z, were rotating at a speed of 1.0 revolution every 12 days. If it were to undergo gravitational collapse to a neutron star 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 th8as:rlw kq/qk9/v*nn7 n / -ez:0yj8zhtf b wiat the lost mass carries off no angular momentum. $\times10^{9 }$ $rev/day$