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Problem: Ecocity has two potential sources of water supply: groundwater and a small river fed by a mountain spring. The river supports a vibrant fish population and other wildlife, so citizens do not want to use any more of it than necessary. Unfortunately, however, their groundwater has barium concentrations in excess of public health standards. Rather than invest money in a treatment to reduce barium concentrations of the groundwater to an acceptable level, the citizens decide to blend groundwater with the river water so that the standard is met. Determine the amounts of river water and groundwater (such that river water use is minimized) that should be used (in m3/day) using the data provided below:
Compute and compare the hydraulic conductivity (m/s) of a formation with respect to the three liquids below. The formation has a permeability k = 0.1 darcy and g = 9.8 m/s2.
A large steel tower is to be supported by a series of steel wires; it is estimated that the load on each wire will be 19,000N. Determine the minimum required wire diameter assuming a factor of safety 5 and that the yield strength of the steel is 900M..
The air transport B is flying with a constant speed of 480 mi/hr in a horizontal arc of 9-mi radius. When B reaches the position, aircraft A, flying south-west at a constant speed of 360 mi/hr
A 100 mm nozzle is bolted (with 6 bolts) to the flange of a 300 mm horizontal pipeline and discharges water into the atmosphere. Calculate the tension load on each bolt when the pressure in the pipe is 600 kPa. Neglect vertical forces.v
You are a real estate salesperson working for Good Earth, Realtors, Inc. You receive 50 percent of all commissions received by the firm (net of MLS fees) for which you were either the listing agent or the selling agent.
A 100 mm diameter log is subjected to two equal loads equally spaced along its 450 mm length at 150mm intervals. The beam has an allowable flexural stress of 9 MPa and a much lower allowable shear stress parallel to the grain of 850 kPa
The length of the strip is 5 in. Calculate the deflection sensitivity defined as the deflection per degree Fahrenheit temperature difference. Estimate the uncertainty in this deflection sensitivity.
Knowing that each of the shafts AB, BC, and CD consists of a solid circular rod, determine (a) the shaft in which the maximum shearing stress occurs, (b) the magnitude of that stress.
In an experiment to estimate the acceleration due to gravity,a student drops a ball at a distance of 1m above the floor. His labpartner measures the time it takes to fall and obtains an estimateof 0.46s.
a temporary diversion has been constructed on a highway due to major repairs thatnbspare being undertaken on a bridge.
Determine the pore water pressure distribution just before the inflow face of the drainage blanket. (c) Calculate the average lateral force from the pore water pressure.
Assuming the average thickness of the completed island is 100 m, determine the quantity of sand required.
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