[填空题]
Suppose a star the size of our Sun, bgh 2*e. aqvbsc78 toe7ut with mq s38b5b apm/pi-ndg ,ass 8.0 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 star of radius 11 km, losing three-quarters of its mass in the process, what would its rotation speenpgapsb8m3d,b q5 i -/d be? Assume that the star is a uniform sphere at all times, and that the lost mass carries off no angular momentum. $\times10^{9 }$ $rev/day$