Water flows horizontally through a pipe of varying cross-section. If the pressure of water equals 5 cm of mercury at a point where the velocity of flow is 28 cm s¹, then what is the pressure at another point, where the velocity of flow is 70 cm s-¹? [Tube density of water 1 g cm-³].
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Answer:
The flow of water in a horizontal pipe is streamline. At a point in the tube where its cross-sectional area is 10cm2, the velocity of water and pressure are 1m/s and 2×103 pascal, respectively.