Compute the maximum shear stress in the circular steel shaft shown if the shaft is subject...

Compute the maximum shear stress in the circular steel shaft shown if the shaft is subjected to the torques indicated. The shaft is solid and 2 in. in diameter for 21 in. of its length and is hollow with an outside diameter of 2 in. and an inside diameter of 1 in. for 21 in. of its length, as shown.

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