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The pipe flow in Fig. P6.52 is driven by pressurized air in the tank. What gage pressure p_1 is needed to provide a 20°C water flow rate Q = 60 m^3/h? <image 1> (A) 2.38E6 Pa (B) 2.61E5 Pa (C) 1.56E6 Pa Answer with the option's letter from the given choices directly. No punctuation. | A Difficulty: Hard Subfield: Fluid Mechanics |