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A smooth, vertical wall is 25 feet high and retains a cohesionless soil with a unit weight of 115 pcf and an angle of internal friction of 30 degrees. The top of the soil is level with the top of the wall, and the soil carries a uniformly distributed load of 500 psf. Calculate the total active earth force of the wall per linear foot and determine its point of application from the base of wall by Rankine theory.
The uniform steel shaft has two gears attached to it at B and C, two frictionless bearings, and the motor. The motor generates 15kip·in and the gears consume 10kip·in and 5kip·in. Find the diameter of the shaft if the maximum rotation between A an..
What is the settling velocity of a floc of diameter 0.15 mm and density 2.12 g/cm3 in water. Will the floc from problem 4 be completely removed in a typical sedimentation basin if alum was used as the coagulant.
Benefits associated with a project are $10,000 forever starting in year 1. The costs are $20,000 in year 0 and $20,000 in year 3. What is the B/C ratio at i=12% per year. First determine present worth for benefit and cost, respectively.
The overpass structure is to be level, centered 26 feet above the railroad, and 180 feet long. How much existing highway (in feet) must be reconstructed to provide appropriate vertical alignment
Nitrification, the conversion of ammonia to nitrate (NH3 -> NO3-) occurs in the lake according to first - order kinetics. One stream feeds the lake and one stream empties the lake with the flow rate in both being 8 cfs
If given a brittle material with a known tensile strength, Sut, and a known compressive strength, Suc, use the four main fracture criteria (MNSC, BCM, MM, and MIIM) to determine the shear stress, tau, in terms of the material properties Sut and Su..
An unknown fluid flows through a horizontal 35-mm-diameter pipe with a Reynolds number of 100,000 and a density of 680 kg/m3. The pressure drop across a 21-mm-diameter nozzle meter placed in the pipe is 4.2 kPa.
A 245 m ship has a displacement of 3x10^8N,and the area defined by the waterline is 3550m^2. will the ship take more or less draft when steaming from salt water to fresh water How much will it settle or rise
The siphon crown is 1.2m above the water surface elevation of the reservoir and a length 10m away from the siphon entrance. If the siphon diameter is 30 cm, if the friction factor is .02, and the headless coefficient are .2 (inlet) and 1 (exit),
Many years ago, well-known architect Frank Lloyd Wright designed a mile-high skyscraper, which has never been built.
A driver with his passenger vehicle is driving at 35 mph, when the traffic signal in front of him changes to yellow. He is 100 feet from the intersection when he applies the brakes after a 1-second reaction time.
At the same instant the frame h, not the horizontal blade, rotates about a vertical axis with a constant angular velocity w=0.9 rad/s, measured relative to h
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