The series-connected water pipelines have a U-shaped mercury manometer (Fig.). Calculate the pressure and velocity of water in two sections of these pipelines, neglecting all pressure losses, if Q = 10 l/s; d1 = 5 cm; d2 = 10 cm; рв = 103 kg/cm3; ppm = 13.6•103 kg/m3; dH = 700 mm Hg; H = 1 m.
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