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Question: 7 a jet of liquid issues from a 30 mm...

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7. A jet of liquid issues from a 30 mm diameter sharp-edged orifice located in the wall of a 1 m diameter cylindrical tank. The orifice is located near the bottom of the tank. (a) Show that the variation of liquid level with time (t) in the tank is given by 2 where: hi Depth of liquid above the orifice initially h2 - Depth of liquid above the orifice at the end D, Diameter of the tank Do Diameter of the orifice C Orifice discharge coefficient g Gravitational acceleration (9.81 m/s?) (b) How long wili take for the liquid level in the tank to drop from 3 m to 1.5 m above the orifice if Cd 0.61? [Ans. 417.2s The discharge coefficient is used to take into account the effect of friction in flow through an orifice and is defined as the ratio of real flow to ideal flow: C. Creal ideal
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