The magnitude of the momentum of a particle can never exceed (a) (b) (c) (d) (e) me, where m is its mass kle, where e is its energy ele, where k is its kinetic energy none of the above, but there is an upper limit none of the above; there is no upper limit

Air enters a gas turbine with two stages of compression and two stages of expansion at 100 kpa and 17°c. this system uses a regenerator as well as reheating and intercooling – the intercooler returns the air to the inlet temperature. the pressure ratio across each compressor is 4 ; 300 kj/kg of heat are added to the air in each combustion chamber; and the regenerator operates perfectly while increasing the temperature of the cold air by 20°c. determine the system’s thermal efficiency. assume isentropic operations for all compressor and the turbine stages and use constant specific heats at room temperature. (0.378)