Question

Water with a density of 1 g/ml through a pipe 10 inches in diameter, An sharp edge orifice with a 2.5 in. diameter opening is placed concentrically on the pipe. A mercury manometer in which the mercury and the flowing water are in contact are attached across the orifice. The manometer indicates a difference in level of 4 inches mercury. The viscosity of water is 1.12 cP. What is the average velocity in the main line?

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1-
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