[填空题]
Suppose a star the size on u8a w/;ay8-z q(aseef our Sun, but with massvyni-m10c m7r +8xpne 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 neutrovn1pcx m erm-y7 i0n+8n 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 that the lost mass carries off no angular momentum. $\times10^{9 }$ $rev/day$
Post time 2025-2-18 20:00:22
