1-54 The diameters of the pistons shown in Fig. P1-54 are Di ber 3, in kPa, when the other pressures are Pi and P2 = 1750 kPa. in cham- a 8 cm and D, = 4 cm. Determine the pressure %3D = 1050 kPa D2 P2 P3 P1 DI

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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.