Air enters the compressor of a gas turbine at 70°f and 0.8 psig and leaves the compressor at 300°f and 36 psig. it leaves the nozzle of the gas turbine at 650°f and 2.5 psig. with the atmospheric pressure of 14.7psi and nozzle exit area of 4 in^2: determine the following: a) pressure ratio b) ideal efficiency c) thrust generated by the engine in lbf d) mach number

Aheat pump using refrigerant-134a heats a house by using underground water at 8°c as the heat source. the house is losing heat at a rate of 60,000 kj/h. the refrigerant enters the compressor at 280 kpa and 0°c, and it leaves at 1 mpa and 60°c. the refrigerant exits the condenser at 30°c. determine: (a) the power input to the heat pump, (b) the rate of heat absorption from the water, and (c) the increase in electric power input if an electric resistance heater is used instead of a heat pump