[填空题]
A centrifuge rotor rotatz8n7cwdfztn 72k g :r+d8ph3wingxs/x79s dnt/wy. qee09xk7zcmmb 0+f i t.tb * at 10,300 rpm is shut off and is eventually brought uniformlym0 d0iy snxs fxtz.m9 bbktw/.t* x7ce+9/7eq 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