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A 120.0-g 12’’ record is dropped onto a 10’’ turntable of mass M=1.0-kg rotating at 45...

A 120.0-g 12’’ record is dropped onto a 10’’ turntable of mass M=1.0-kg rotating at 45 rpms. What is the angular velocity of the turntable in rad/s after the record is dropped on? What fraction of kinetic energy is lost to friction between the record and the turntable?

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