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An open tank of 5 m in diameter discharges water freely from a sharp-edged 25 cm diameter opening in the bottom. The discharge velocity is

An open tank of 5 m in diameter discharges water freely from a sharp-edged 25 cm diameter opening in the bottom. The discharge velocity is a function of the water depth in the tank (h): vo = 0.62 gh 2 , where g is the acceleration of gravity, g = 9.81 m/s 2 . The original water depth is 3.65 m. What is the time to empty half of the tank?

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