A tank contains 50 kg of water, which is stirred by a paddle wheel at 300 rpm

Question:

A tank contains 50 kg of water, which is stirred by a paddle wheel at 300 rpm while transmitting a torque of 0.2 kNm. After the tank achieves steady state, determine
(a) The rate of heat transfer.
(b) The rate of entropy transfer into the atmosphere.
(c) The rate of entropy generation in the tank's universe. Assume the atmospheric temperature to be 25oC.