The large cylindrical tank contains air at an absolute pressure of 200 psi and temperature of 90°F. The throat of the nozzle has a diameter of 0.25 in., and the exit diameter is 0.75 in. (Figure 1) Part A Determine the absolute pressure in the pipe required to choke the nozzle and also maintain isentropic subsonic flow through the pipe. Express your answer using four significant figures. p = psi Part B What is the velocity of the flow through the pipe for this condition? Express your answer to three significant figures and include the appropriate units. V = Value Units

Nitrogen discharges isentropically through a nozzle from a reservoir. The pressure from section 1 of the nozzle is 10,445.6 pounds per square foot, and the Mach number is 0.45. A mercury manometer is attached to the nozzle's two portions, section 1 and section 2, where the velocity is accelerated to 480 meters per second. Calculate the temperature at section 2 if the mercury manometer measures a change in height of 3.9 feet. For Nitrogen R = 0.29686 kJ/kg·K, and cp = 1.039 kJ/kg·K.

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