Air at 40C flow steadily through the pipe shown in Fig. P516. If P 1 = 50

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Air at 40°C flow steadily through the pipe shown in Fig. P5–16. If P1 = 50 kPa (gage), P2 = 10 kPa (gage), D = 3d, Patm ≅ 100 kPa, the average velocity at section 2 is V2 = 30 m/s, and air temperature remains nearly constant, determine the average speed at section 1.


FIGURE P5–16

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