A piston of diameter D, moving uniformly with a speed o

A piston of diameter D, moving uniformly with a speed of vp, delivers fluid to a closed tank with an excess pressure pm on the surface of the fluid. The difference in fluid levels in the cylinder and tank is z0. Pressure pipe - length l, diameter d, steel, new, welded. Hydraulic resistance shown in the figure. Liquid temperature - t ºС. Determine the force P applied to the piston.
Given: liquid - gasoline; z0 = 2.6m; pm = 0.08MPa = 0.08 * 106Pa; l = 18m; D = 65mm = 0.065m; d = 20mm = 0.02m; vп = 22cm / s = 0.22m / s; t = 250C.
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