Задача 35 На рисунке представлен сосуд

Task 35 The figure shows a vessel flowing through a smoothly expanding nozzle with water. The height of the water in the vessel H = 3m, the diameter of the wide part of the pipe D, narrow d = 4 cm, respectively. The ambient pressure is atmospheric, in section 1.1, pressure p is vacuum. Water density p = 1000 kg/m3, flow rate Q = 30 l/s. There are no pressure losses in the branch pipe. Identify missing data
H = 3m; P -?, D - ?, d = 4cm, Q = 30L/s

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