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The chamber of a rock-tumbling machine is a hollow cylinder withmass 69 g and radius 7.1 cm. The chamberis closed off by end caps in the form of uniform circular diskseach of mass 22 g.

a) What is the rotational inertia of the chamber aboutits central axis?

b) What torque is necessary to give the chamber an angularacceleration of 2.9 rad/s²?

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