Air flows isentropically through a duct. At section 1, thepressure and temperature are 250 kPa and 125°C, andthe velocity is 200 m/s. At section 2, the area is 0.25 m2 andthe Mach number is 2.0. Determine (a) Ma1; (b) T2; (c) V2;and (d ) the mass fl ow.

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