Two cylinders are filled with liquid water (p = 998 kg/m³), and connected by a pipe line with a closed valve. Cylinders A (inside diameter = 42.75 cm) and B (inside diameter = 55 cm) contain 125 kg and 450 kg of water, respectively. The height h as indicated in Fig. 3 is 0.85 m. Determine the pressure (in kPa) of cylinder A and cylinder B on either side of the valve. If the valve is opened such that water flows to an equilibrium between the two cylinders, find the final pressure (in atm) at the valve location. Assume Po 100 kPa. Po B g Figure 3 Po

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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.