As shown in (Figure 1), electric current from a photovoltaic (PV) cells runs an electric motor. The shaft of the motor turns the paddle wheel inside the water tank. Identify the interactions (mass, heat, work) for the combined system that includes all these three subsystems. Select all that apply.   work out heat out heat in work in

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A:

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A: .

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Q: R Pulley m V=5 ft/s

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A: For solution refer below images.

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A: For solution refer below images.

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Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.