[填空题]
A centrifuge rotor rotating at 10,3pr .+)a4p gqk jsisa8/00p ol joq.-c 1vio:wh2+v 8pnk* rpm is shut off and is eventually brought uniformloq vjk*ho.1cpnl-v8:i w+ 2o py to rest by a frictional torque of 1.2 $m \cdot N$ If the mass of the rotor is 4.80 kg and it can be approximated as a solid cylinder of radius 0.0710 m, through how many revolutions will the rotor turn before coming to rest, $rev$ how long will it take? s