F the tubular shaft is made from material having an allowable shear stress of τallow = 79 MPa , determine the required minimum wall thickness of the shaft to the nearest millimeter. The shaft has an outer diameter of

answer:

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explanation:

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If the temperature goes on increasing with respect to the length (i.e temperature gradient)then it is called positive heat transfer. If the temperature gradient decreases then it is called negative heat transfer.

Explanation: