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A centrifuge rotor rotating at 9400 rpmrpm is shut off and is eventually brought uniformly to rest by a frictional torque of 1.74 mNmN .

A centrifuge rotor rotating at 9400 rpmrpm is shut off and is eventually brought uniformly to rest by a frictional torque of 1.74 mNmN .

a) If the mass of the rotor is 4.01 kgkg and it can be approximated as a solid cylinder of radius 0.0850 mm , through how many revolutions will the rotor turn before coming to rest?

b)How long will it take?

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