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A truck driver used sand to soak up a 1 g spill of lindane (C6H6Cl6). He placed the contaminated soil in an open drum which then filled with 150 L of water during a rainstorm. You test the water and find a concentration of 17 M/L. The partition coefficient for this chemical to the soil is 0.8 L/kg. How much sand did he place in the drum? Hint: the total mass of the lindane spill is now split between the water and the soil according to the partition coefficient.
A 1-inch elevator cable is 1000 feet long. The modulus of elasticity for the cable is 25,000,000 psi. Determine the total elongation of the cable due to a load of 20,000 pounds.
An undisturbed soil sample was collected in a sampling tube of internal diameter 5cm. The length of the extracted sample was 10.2 cm and its mass was 360 g. After oven drying the mass reduced to 326.5 g.
determine the horizontal spacing of the vertical drains if the drains are installed in triangular grid to reach 90% of primary consolidation in 1.5 years after the commencement of fill placement
what criteria should Zachary use evaluate the project ?
A manometer is used to measure the pressure difference between points A and B in a pipe. Water flows in the pipe, and the specific gravity of the manometer fluid is 2.8. The distances and manometer deflection are indicated.
An industry discharges PCE (tetrachloroethene, tetratchloroethylene, or perchloroethylene) into a small, well-mixed lake. The influent concentration is 0.4mg/L and the hydraulic residence time of the lake is 5days.
The plate is submerged in a liquid is a vertical position with the parallel sides horizontal and the shorter parallel side at the top and exactly in the surface of the liquid.
A building frame is made with a 10" square steel box shape that has an area of 15 in^2 and a moment of inertia I =225 in^4. The frame consists of pinned supports at points A and F and an internal pin at point D.
A rectangular channel 2.0 m wide carrying a discharge of 2.5 m3/s is to be fitted with a weir at its downstream end to provide a means of flow measurement as well as to cause heading-up of the water surface.
Would you expect to find the Tapeats Sandstone on top of the Great Unconformity in all places in the Grand Canyon? Why, or why not?
If you were asked to perform an excavation contract competitively with limited data, what type of contract would you want and why?
Briefly explain the difference between piezometer and tensiometer with respect to the working principle, special design consideration and limitation of the instrument.
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