(Answered) Air flows from a reservoir through a nozzle into a receiver

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Air flows from a reservoir through a nozzle into a receiver. The reservoir is maintained at 400 kPa absolute and 20-C. The nozzle has a 10-cm-diameter throat and a 20-cm-diameter exit. Determine the receiver pressure needed to locate a shock wave at the exit. For that pressure, calculate the mass flux and the velocity just before the shock.

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