Air with initial state at 12500 ft is allowed to expand isentropically to a state where pressure is 1100 psf. Calculate the specific weight after the expansion. a. 4.58x10^-3 lb/ft^3 b. 0.0458 lb/ft^3 c. 0.0458x10^-2 lb/ft^3 d. 0.0575 lb/ft^3 e. 458 lb/ft^3

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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.