[填空题]
A centrifuge rotor rotating at 10,300 rpm is 7mo)n3o tvq 3oshut off and is eventually broyg* w6pt ai d(q:sna, 7yc(z8xkgs40mught uniformly to rest by a frictionay8 wz6ai ay((4sp n7*q:g cmdxskt ,g0l 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