Question: Nitrogen gas flowing in a 50-mm diameter pipe at 15C, 200 kPa, at the rate of 0.05 kg/s, encounters a partially closed valve. If there

Nitrogen gas flowing in a 50-mm diameter pipe at 15°C, 200 kPa, at the rate of 0.05 kg/s, encounters a partially closed valve. If there is a pressure drop of 30 kPa across the valve and essentially no temperature change, what are the velocities upstream and downstream of the valve?

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