A strip is 300 mm wide and 30 mm thick is rolled to a thickness of 20 mm in one pass. The roll radius is 200 mm, and the rolls rotate at 200 rpm. If the rolling die can exert 500 kW of power for this operation. Find the possible strip material(s) if the strain hardening exponent is assumed to be 0.2.

If you were designing a bumper for a car, would you prefer it to exhibit elastic or plastic deformation? why? consider the functions of a bumper in both a minor "fender-bender" and a major collision.

The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false

An air conditioning system consist of a 5 cm diameter pipe, operating at a pressure of 200 kpa. the air initially enters the pipe at 15°c with a velocity of 20 m/s and relative humidity of 80%. if the heat supply throughout the process is 960 w, determine the relative humidity and the temperature at the outlet