Air at a pressure of 90 psia and a temperature of 250 F enters an ideally designed converging-diverging nozzle from a large plenum chamber. The air is supposed to expand to ambient pressure without any shock wave present. (Assume isentropic expansion of dry air). Find (a) the area of the nozzle throat in square inches that will permit a mass flow rate of 3.0 lbm/s and (b) the Mach number and area at the nozzle exit

Agas contained in a piston-oylinder assembly is initially at p1=100 ibf/ft^2? and occupies a volume of 3.75 ft. the gas is compressed to a pressure p2=500 ibf/ft^2 and a final volume of 0.5 ft. during the process, the relationship between pressure and volume is given as p= a +bv, where a and b are constants a)-determine the values and units for a and b b)-determine the volume, in ft, at an intermediate state where the pressure is 300 ibt/t2.