Задача id10765

Not far from the end of a pipeline with a diameter d = 0.15 m transporting a viscous liquid (p = 900 kg/m3, v = 1•10-4 m2/s), there is a Ludlo valve. Determine the piezometric pressure in front of the valve at a flow rate of Q = 0.04 m3/s, if the valve opening degree is n = 0.75. At the end of the pipeline the pressure is equal to atmospheric pressure.

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