A part made from annealed AISI 1018 steel undergoes a 20 percent cold-work operation. Determine the true strain of the material due to cold-working. Also specify what happens to the material due to cold-working. The yield strength before cold-work operation is 32 32 Correct kpsi. The yield strength after cold-work operation is 61.8 61.8 Correct kpsi. The percentage increase in yield strength is 93 93 Correct percent. The percentage increase in ultimate strength is 25 25 Correct percent. The true strain is 0.25 0.25 Incorrect .

Apump is used to circulate hot water in a home heating system. water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. the inlet pressure and temperature are 14.7 lbf/in.2, and 180°f, respectively; at the exit the pressure is 60 lbf/in.2 the pump requires 1/15 hp of power input. water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 btu/lb or. neglecting kinetic and potential energy effects, determine the temperature change, in °r, as the water flows through the pump.

Abrake has a normal braking torque of 2.8 kip in and heat-dissipating cast-iron surfaces whose mass is 40 lbm. suppose a load is brought to rest in 8.0 s from an initial angular speed of 1600 rev/min using the normal braking torque; estimate the temperature rise of the heat dissipating surfaces.

Assuming compressible flow of air and that the measurements are done at flagstaff a pitot static tube that gives the difference of total and static pressure measures 0.35 m of mercury. what is the velocity of air? assume the temperature to be 300k. (submit your excel or matlab calculation sheet)