Figure 5.10 shows the flow net for seepage of water around a single row of sheet piles driven into a permeable layer. Calculate the factor of safety against downstream heave. Given: t for the permeable layer = 112.32 lb/ft³. -Sheet pile H = 30 ft Heave zone H2=5 ft 20 ft Ysat.= 112.32 Ib/ft Impermeable layer Figure 5.10 Flow net for seepage of water around sheet piles driven into permeable layer

12. Points A and B are 3000 ft apart along a 10-in. new steel pipe. B is 220 ft higher than A. With a flow of 3.2 efs of water from A to B, what pressure must be maintained at A if the pressure at B is to be 50 Ib per sq in.?   Answer should be: 164 lb per sq. inch Show your handwritten solution.

Please answer Fluid Mechanics Hw problem #8

Problem 5: Pipe Flow A 10,000 ft P BC 20,000 ft D This semester we worked through several versions of the pipe flow problem sketched above, in which a 3.0 ft diameter pipe is used to convey water from reservoir A (surface elevation 80 ft) to reservoir D (surface elevation 90 ft). In week 14, we considered a specific example with a cast iron pipe (A = 0.00085 ft), flow rate of Q=40 ft³/s, and average velocity of V = 5.66 ft/s. For these conditions, the friction factor was λ = 0.015 and the pump added 86 ft of head. Assume the water temperature is always 60°F. Part A Assuming the pump is 75% efficient and electricity costs 10e/kW.hr, how much will it cost to run this pump for a year? Hint, 1 kW hr = (1000 watts) (1 hr) = (1000 J/s)(3600 s) = 3.6x106 J. Part B Now let us assume we need to double the discharge to Q = 80 ft³/s, but unlike the example in week 13, we are not going to make the false assumption that the friction factor λ is constant. You may, however, assume that the roughness…