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A 500-L tank contains 15 mg/L of trichloroethylene (TCE; C2HCl3) dissolved in water. What is the TCE concentration in ppm if the tank is held at (a) 4 degrees C and (b) 35 degrees C? (c) What is the TCE concentration in ppm if the tank is filled with hexane instead of water? Consider the temperature dependence of the density of water, while the density of TCE is 1.464 kg/L and density of hexane is 0.6603 kg/L.
Determine the required pumping rate. the aquifer has T= 1600 m 2 /day and the wells each have radius of influence of 600m.
Suppose that the distance from the lake outlet to the withdrawal cannot be more than 20 mi. What should be the new volume of the lake?
A 3-ft diameter column with weight of 150 kg is placed on top of 1 m thick aggregate layer. The soil beneath the aggregate layer is sand. The friction angle of the aggregate is 36 degrees and the unit weight is 22 lb/ft3. What is the pressure acti..
Should Bernard bid for the project assignment? Why or why not? Does Bernard have an unfair advantage over firms having designed the project on which he wants to bid?
Air enters an adiabatic nozzle steadily at 300 kPa, 200 o C, and 30 m/s and leaves at 100 kPa and 180 m/s. The inlet area of the nozzle is 80 cm 2 . Determine (a) the mass flow raw through the nozzle, (b) the exit temperature of the air, and (c) the ..
a cantilevered bean has a lenght of L, a cross section area of A, and a flecural rigidity of EI. The free end is free to rotate and displace due to bending. derive the stiffnes of the cantilevered bean. Assume small deformations.
An equal tangent vertical curve conects an initial grade of -3% and a final grade of +1% and is designed for 60mi/h. The PVI is at station 250+50 and elevation 732 ft. What is the station and elevation of the lowest point on the curve
A fisherperson, pulling on the anchor cord, causes a force on the man of F=(40i+20j-50k)N. If the cord is 30m long,determine the Cartesian coordinates of the anchor at A. Assume that cord OA is a straight line.
Lines of levels were run requiring n instrument setups. If the rod reading for each backsight and foresight has a standard deviation δ what is the standard deviation in each of the following level lines?
inability and green engineering can be integrated in the four components of materials science and engineering?
calculate the required compressive strength for a concrete mix design if f'c = 5000 psi and data indicate a standard deviation of 600 psi based on 15 tests for a similar concrete mix.
using darcy's law compute the quantity of flow, seepage velocity and contaminant loading of the river. ground water is flowing through unconfined uniform 3m thick sand aquifer and discharging to river.
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