[填空题]
A centrifuge rotor rotating at 10,300 rpm is shut off and is eventuallcqn;g+ulebq+ 7/n.em98slaq y bro9:lzm yrs uq3 e:ru07yught uniformly to rest by a frictional torque of 1.0ur39s mlurqy::y7ze2 $m \cdot N$ 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