Calculate the forging force for the cylindrical workpiece made of 1020 steel that is 90 mm high and 125 mm in diameter and is reduced in height by 40%. Assuming that it is a complex forging and that the projected area of the flash is 30% greater than the projected area of the forged workpiece.

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?