[填空题]
A centrifuge rotor rotating atp+v1lt(gg s+u 10,300 rpm is shut off and is eventu26lbz uw)q,nv gj/7uz+te90e. i amwually brought uniformly to rest by a frictionja)9 l7mq6tvu 0e.+,znw2u/ gbwzieual 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