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Question

A horizontal pipe line carries water in a streamline flow. At a point along the tube where the cross-sectional area is 102 m2, the water velocity is 2 ms1 and the pressure is 8000 Pa. The pressure of water at another point where the cross-sectional area is 0.5×102m2 is?

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Solution

P1P2=12ρ(v22v21)
12ρ(v22v21)
12ρv21(v22v211)
12×1000×(100251)
P28000=1500
P2=9500 Pa

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