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3) Find the moment of inertia of a hollow cylinder with mass m, length L. The object is rotating around its axis of symmetry.

3) Find the moment of inertia of a hollow cylinder with mass m, length L. The object is rotating around its axis of symmetry. The distance from the axis to the inner edge of the shell is a, and the distance from the the axis to the outer edge is b. (Hint: dm = p dV = pL2dr)

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