A converging-diverging nozzle operating at steady state has a throat area of 3 cm^2 and an exit area of 6 cm^2. Air as an ideal gas with k = 1.4 enters the nozzle at 8 bar, 400 K, and a Mach number of 0.2 and flows isentropically throughout. If the nozzle is choked and the diverging portion acts as a supersonic nozzle, determine the mass flow rate, in kg/s, the Mach number, pressure, in bar, and temperature, in K, at the exit. Repeat if the diverging portion acts as a subsonic diffuser

Liquid flows at steady state at a rate of 2 lb/'s through a pump, which operates to raise the elevation of the liquid 100 ft from control volume inlet to exit. the liquid specific enthalpy at the inlet is 40.09 btu/lb and at the exit is 40.94 btub. the pump requires 3 btu/s of power to operate. if kinetic energy effects are negligible and gravitational acceleration is 32.174 tt/s, the heat transfer rate associated with this steady state process is most closely 1)-2,02 btu/s from the liquid to the surroundings 2)-3.98 btu/s from the surroundings to the liquid. 3)-4.96 btu/s from the surroundings to the liquid. 4)-1.04 btu/s from the liquid to the surroundings.