In figure 1, L = 2300 m, H = 15 m, d = 1.2 m, f...

 

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In figure 1, L = 2300 m, H = 15 m, d = 1.2 m, f = 0.030, calculate the time after sudden opening of the valve for the velocity to reach 90% of its final velocity. [201 In figure 1, L = 2300 m, H = 15 m, d = 1.2 m, f = 0.030, calculate the time after sudden opening of the valve for the velocity to reach 90% of its final velocity. [201