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Question: A shock across which the pressure ratio is 1.18 moves down a duct into still air at a pressure of 100 kPa and a temperature of 30°C. Find the temperature and velocity of the air behind the shock wave. If instead of being at rest, the air ahead of the shock wave is moving toward the wave at a velocity of 75 m/s, what would be the velocity of the air behind the shock wave?

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