A cylinder of 100 mm diameter and 400 mm height is subjected to open-die forging to accomplish a reduction in the height to 150 mm at high temperature. Calculate the magnitude of the force required to give this reduction in height if the strain rate is constant at 10 s-1. Assume that the strength constant is 120 MPa and that the strain rate sensitivity exponent is 0.15. Also assume that there is no effect of friction with the tooling and no work hardening. (2 points)

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.

Afluid flows with a velocity field given by v=(x/t)i.. determine the local and convective accelerations when x=3 and t=1.

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?