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An air tank is maintained at 1.8 atmospheres absolute and 20 degrees Celsius. Air exits the tank from a converging nozzle with an exit diameter

An air tank is maintained at 1.8 atmospheres absolute and 20 degrees Celsius. Air exits the tank from a converging nozzle with an exit diameter of 2.5 cm. Assume the flow is adiabatic and reversible with surrounding atmosphere of 1 atm. 1. Is the flow choked? How do you know? 2. Calculate the minimum stagnation pressure for choked flow

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