Question: Helium gas enters a nozzle, whose isentropic efficiency is 94 percent with a low velocity, and it exits at 14 psia, 180F, and 1000 ft/s,

Helium gas enters a nozzle, whose isentropic efficiency is 94 percent with a low velocity, and it exits at 14 psia, 180°F, and 1000 ft/s, determine the pressure and temperature at the nozzle inlet.

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