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A CU triaxial test was conducted on a normally consolidated sample of a saturated clay. Its undrained shear strength at a mean effective stress of 100 kPa was 22 kPa. Estimate the undrained shear strength of a sample of this clay if Ro = 15 and the initial stresses are the same as the sample that was tested. The consolidation parameters are λ = 0.28 and k = 0.06.
Calculate the concentration of oxygen in the water in equilibrium (in mg/L) with the atmosphere near La Paz, Bolivia (3650 m), at 20 degrees Celcius.
A small lake with volume of 20,000 m^3 has no natural pollutant sources. However, a sewage pipe discharges sewage containing an organic polluntant into the lake. Conditions in the sewage pipe are Qs= 0.5 m^3/s, and Cs= 100mg/L.
How many kg/day of NaOH must be added to neutralize a waste stream generated by an industry producing 90.8 million g/day of sulfuric acid, if 0.1% of the sulfuric acid produced is lost to wastewater The wastewater flow is 750,000 L/day
A small hole about 4" in diameter and 6" deep is dug into acompacted layer of a soil embankment. 2.96 lbs of motor oil withGs=0.92 is required to fill the hole.
Steady, incompressible flow is given by the following flowfields (a) u=-2y, v=-2x, and (b) u= 0.5+1.2x, V= -2-1.2y.Determine
the apparent gas constant of the mixture.
A coal fired power plant can be modeled as a heat engine. If the power output of the plant is 200 MW and the thermal efficiency is 42%, determine the amount of coal used per day if the heat of combustion from the coal is 24,000 kJ/kg.
Determine the minimum power input required. Also, determine the minimum height to which the brackish water must be pumped if fresh water is to be obtained by reverse osmosis using semipermeable membranes.
A pipeline 1200 ft long and 8 in. in diameter has at its inlet point 75ft of available hydraulic energy with respect to the reference level. The velocity in the pipe is 5 fps: the pressure at its end is 12psi.
It is desired to transmit 300mm^3/s of gasoline at 20 degree Celsius through a 650mm long horizontal tube with a head loss of 500mm Find the diameter of the tube to accomplish this.
A satellite is launched 600 km from the surface of the earth, with an initial velocity of 8333.3 m./s, acting parallel to the tangent of the surface of the earth. Assuming the radius of the earth to be 6378 km and that is 5.976 * 10^6 kg, determine t..
A 5-ha residential development with 0.4-ha lots is to be drained such that the first 25mm of runoff is retained onsite and the postdevelopment peak discharge rate from the site is not to exceed 1m^3/s for thje 25-year 1-d rain event. The natural soil..
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