270911 Hydraulics version 7

Problem number B3
Determine the differential pressure in closed vessels, if the height levels of water and oil from the center of the vessel to the level of mercury in the U-shaped tube are respectively HB = 0.37 and m = 0.32 m hM, oil density ρm = 890 kg / m3, Mercury ρrt = 13550 kg / m3.
Problem number G3
To determine the resultant pressure force on the water semicylindrical surface. The water depth on the left H = D = 1 m, h = 0,5 to the right m. Length to the cylinder in a plane perpendicular to the plane of the drawing, B = 3 m.
Problem number E3
Calculate the equivalent length of local resistance to the steel pipe used, if the coefficient of local resistance in Weisbach formula is ζ = 1,65, pipe diameter d = 0,05 m, the average speed of movement of water in it V = 1 m / s, temperature water t = 10 0 C.
Problem number K3
To determine the duration of the closing valves on the pipeline, if the pipeline length l = 800 m, the average velocity of the water in the tube V = 3 m / s, the allowable line pressure p2 = 1 MPa, and hydrostatic pressure p1 = 200 kPa