Two previously undeformed cylindrical specimens of an alloy are to be strain hardened. This strain hardening will reduce their cross-sectional areas, maintain their circular cross sections and achieve the same final hardness value. For one specimen, the initial and deformed radii are 14.3 and 12 mm, respectively. If the second specimen has an initial radius of 12 mm, what is its final radius (in mm

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

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?

Air is flows through an adiabatic nozzle with an inlet pressure of 400 psia at a temperature of 300°f and a velocity of 20 ft/s. the outlet pressure is 40 psia and the velocity is 800 ftl/s. determine the outlet temperature of the air using: a) property tables b) specific heat (using the specific heat value for air at 300°f)