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categoryهندسة ميكانيكية schoolبكالوريوس event_available2026-07-15

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Water, p=1000 kg/m³ and v = 1.02 ×106 m²/s, is pumped between two reservoirs at 0.0508 m³/s through 122 m of 5.08 cm diameter pipe and several minor losses, as shown. The roughness ratio is ε/d = 0.001. Compute the pump power required. Take the following minor losses Loss element Ki Sharp entrance 0.5 Open globe valve 6.9 bend, R/D = 2 0.15 Threaded, 90P, reg., 0.95 elbow Gate valve, 1/2 2.7 closed sharp exit 1 Z₁=6 m Sharp entrance Screwed regular 90° elbow bend radius Pump Open globe valve 122 m of pipe, d=5.08 cm Sharp exit 2 Z₂-36 m Half-open gate valve

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