Air at 308C flows over a 3.0-cm-outer-diameter, 45-m-long pipe with a velocity of 6 m/s
Chapter 11, Problem 11-126(choose chapter or problem)
Air at 308C flows over a 3.0-cm-outer-diameter, 45-m-long pipe with a velocity of 6 m/s. Calculate the drag force exerted on the pipe by the air. (Air properties at 308C are: r 5 1.164 kg/m3, n 5 1.608 3 1025 m2/s.) (a) 19.3 N (b) 36.8 N (c) 49.3 N (d ) 53.9 N (e) 60.1 N
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