Air is compressed adiabatically in a piston–cylinder assembly from 1 bar, 300 k to 7 bar, 600 k. the air can be modeled as an ideal gas and kinetic and potential energy effects are negligible. determine the amount of entropy produced, in kj/k per kg of air, for the compression. what is the minimum theoretical work input, in kj per kg of air, for an adiabatic compression from the given initial state to a final pressure of 7 bar? note that work is positive into the compressor.

Asimple speed reducer is composed of 2 spur gears. the pinion gear has a pitch diameter of 0.75" and 36 teeth while the driven gear has a pitch diameter of 4.0" and 192 teeth. a)-what is the diametral pitch of each gear? b)-if an electric motor rotating ccw at 3000 rpm is coupled to the pinion, what is the rotational speed of the driven gear? c)-if the torque delivered to the pinion is 1 n-m, what is the torque on the driven gear? d)-what is the power transmitted by the gear train?