#Heat Tranfer How to do a problem.
7-15 The top surface of a hot block is to be cooled by forced air. The rate of heat transfer is to be
determined for two cases.

Shafts are machine elements that are used to a) carry axial loads b) direct shear loads c) transmit power d) rotate at constant speed e) none of the above circular and square shafts subjected to the same torque under the same circum behave a) the same way b) almost the same way