N2 flows through a nozzle of exit area 0.002 m^2 at a rate of 0.005 kg/s at steady state. the inlet pressure to nozzle is 200 kpa, inlet temperature is 200 c, and exit pressure is 50 kpa, exit temperature is 50 c. find the exit velocity. find the heat loss from the nozzle. hint: use ideal gas equations, write energy equations, take u=cv*t, h=cp*t if required. neglect potential energy changes and inlet velocity to the nozzle.

Two flowing streams of argon gas are adiabatically mixed to form a single flow/stream. one stream is 1.5 kg/s at 400 kpa and 200 c while the second stream is 2kg/s at 500 kpa and 100 ? . it is stated that the exit state of the mixed single flow of argon gas is 150 c and 300 kpa. assuming there is no work output or input during the mixing process, does this process violate either the first or the second law or both? explain and state all your assumptions.

Different types of steels contain different elements that alter the characteristics of the steel. for each of the following elements, explain what the element does when alloyed with steel.

Determine whether or not it is possible to compress air adiabatically from k to 140 kpa and 400 k. what is the entropy change during this process?