Consider a compressor with 80% efficiency used to compress ethylene (C2H4). What is the work required to compress 1,000kg/hr of ethylene if it enters the compressor at 0.14 MPa and 200 K and must exit at the compressor at 2 MPa.

Aplate clutch has a single pair of mating friction surfaces 250-mm od by 175-mm id. the mean value of the coefficient of friction is 0.30, and the actuating force is 4 kn. a) find the maximum pressure and the torque capacity using the uniform-wear model. b) find the maximum pressure and the torque capacity using the uniform-pressure model.