Water flows from the pressure tank, where the excess ai

Water flows from the pressure tank, where the excess air pressure rm, into the open tank through a short pipe with a diameter d, on which the tap is installed. What must be equal to the coefficient of resistance of the tap in order for the water flow to be Q? The heights of the H1 and H2 levels are given. Consider the pressure loss at the inlet to the pipe (ζin = 0.5) and at the outlet of the pipe.
Given: pm = 0.38MPa = 0.38 * 106Pa; d = 60mm = 0.06m; ζin = 0.5; H1 = 0.95m; H2 = 3m; Q = 10.95l / s = 10.95 * 10-3 m3 / s
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