A converging-diverging nozzle is designed to produce a Mach number of 2.5 with air. (a) What operating

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A converging-diverging nozzle is designed to produce a Mach number of 2.5 with air.

(a) What operating pressure ratio ( \(p_{\text {red }} / p_{t}\) inlet) will cause this nozzle to operate at the first, second, and third critical points?

(b) If the inlet stagnation pressure is \(150 \mathrm{psia}\), what receiver pressures represent operation at these critical points?

(c) Suppose that the receiver pressure were fixed at \(15 \mathrm{psia}\). What inlet pressures are necessary to cause operation at the critical points?

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