Air at 600 kpa and 500 k enters an adiabatic nozzle that has an inlet-to-exit area ratio of 3: 1 with a velocity of 120 m/s and leaves with a velocity of 380 m/s. determine (a) the exit temperature and (b) the exit pressure of the air.

The material that keeps its new shape after it is stretched is called?

Asheet of steel 1.5 mm thick has nitrogen atmospheres on both sides at 1200oc and is permitted to achieve a steady-state diffusion condition. the diffusion coefficient for nitrogen in steel at this temperature is 6 x 10- 11 m2 /s, and the diffusion flux is found to be 1.2 x 10-7 kg/m2 -s. also, it is known that the concentration of nitrogen in the steel at the high-pressure surface is 4 kg/m3 . how far into the sheet from this high-pressure side will the concentration be 2.0 kg/m3 ? assume a linear concentration profile.

Positrons are spontaneously emitted from the nuclei of