Question: Nitrogen flows steadily through a variable-area duct with a mass flow rate of 3 kg/s. It enters the duct at 1200 kPa and 250oC with

Nitrogen flows steadily through a variable-area duct with a mass flow rate of 3 kg/s. It enters the duct at 1200 kPa and 250oC with a low velocity and expands to a pressure of 300 kPa. The duct is designed so that the flow can be approximated as isentropic. Determine
(a) The Mach number,
(b) The velocity at the exit and the throat.
(c) Flow area and

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