Two previously undeformed specimens of the same metal are to be plaastically deformed by reducing their cross sectional areas. one has a circular cross section, and the other is rectangular. during deformation the circular cross section is to remain circular, and the rectangular is to remain rectangular.
their original and deformed dimensions are given in the following table:

which of the two specimens will be the hardest after plastic deformation, and why?

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?

Burgers vector is generally parallel to the dislocation line. a)-true b)-false

Derive the correction factor formula for conical nozzle i=-(1+ cosa) and calculate the nozzle angle correction factor for a nozzle whose divergence hal-fangle is 13 (hint: assume that all the mass flow originates at the apex of the cone.