Estimate the force required to upset a 5 mm diameter C74500 brass rivet in order to form a 10 mm diameter head. Assume that the coefficient of friction between the brass and the tool-steel die is 0.25 and that the head is 5 mm in thickness. Use S y = 175 Sy=175 MPa.

Air at a pressure of 1atm and a temperature of 40 c is in parallel flow over the top surface of a flat plate that is heated to a uniform temperature of 120 c. the plate has a length of 0.40m (in the flow direction) and a width of 0.15m. the reynolds number based on the plate length is 50, 000. what is the rate of heat transfer from the plate to the air? if the free stream velocity of the air is doubled and the pressure is increased to 10 atm what is the rate of heat transfer?