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5-15 As shown in Figure P5-15, air flows steadily through the pipe at 40 C. If Pi=40kPa (gauge pressure), P2=10kPa (gauge pressure), D=3d, Patm100kPa,

5-15 As shown in Figure P5-15, air flows steadily through the pipe at 40 C. If Pi=40kPa (gauge pressure), P2=10kPa (gauge pressure), D=3d, Patm100kPa, the average velocity at section 2 is V2=25m/s, the air temperature is basically unchanged, try to determine the average velocity at section 1. P1 1. 2. Figure P5-15 P2 fimiant

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