2.5 kg of air at 150 kpa and 12°c is contained in a gas-tight, frictionless piston-cylinder device. the air is now compressed to a final pressure of 600 kpa. during the process, heat is transferred from the air such that the temperature inside the cylinder remains constant. calculate the work input during this process.

An electrical motor raises a 50kg load at a construct velencity .calculate the power of the motor, if it takes 40sec to raise the load through a height of 24m(take g =9.8n/g)

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.

The higher the astm grain-size number, the coarser the grain is. a)-true b)-false