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A well of 0.1 m radius is part of a well point network to keep an excavation dry (Figure P6.13). The groundwater at the far edge of the excavation must be 0.5 m below the base.
(a) Calculate the radius of influence.
(b) Calculate the maximum drawdown.
(c) Plot the drawdown curve.
(d) For the radius of influence in (a),
(i) calculate the discharge if the well radius increases to 0.2 m, and
(ii) compare it to the discharge for the 0.1-m-radius well.
How many years would it take for money to triple in value at 20% per year simple interest? Please be descriptive on where the numbers and formulas comes from.
Two towers A and B are located on flat ground and their bases have equal elevations above sea level. A person on tower A whose eye level is 26.0 ft above the ground can just see the top of tower B, which is 105 ft above the ground. How far apart a..
A dispersed plug chemical reactor has an influent flow with concentration of 150 mg/L of A and a flow rate of 100 gal/min (380 L/min). The reaction is first order, The rate equation : - dC/dt = kC= -r , and the rate constant is 0.4 h^-1 .
seven hundred sixty-five meters cubed of solid waste is dumped ate the site 5 days a week. This waste is compacted to twice its delivered density. Estimate the expected life of the landfill in years.
The base line vector between the base and roving reciever is 8340m and has an accuracy of +/-(1to 2 cm +/-2ppm). What is the estimated uncertainty in the length of this vector?
A piston-cylinder assembly containing 1/4 kg of a gas undergoes a constant pressure process at 5 bar beginning with a specific volume of 20 m^3/kg. for the gas in the system the work is -15 kj. determine the final volume of the gas in m^3
What will the freeway's density and level of service be before and after the ban? (Assume that the trucks are removed and all other traffic attributes are unchanged)
The maximum and minimum dry unit weights of a sand were determined in the laboratory to be 104 lb/ft^3 and 93 lb/ft^3, respectively. what would be the relative compaction in the field if the relative density is 78%
Calculate the rate of entropy change for each component of a refrigerator that uses 10 kW power, rejects 14 kW heat and has a high temperature reservoir at 400 K
The number of flaws on a sheet of aluminum manufactured by a certain process follows a Poisson distribution. In a sample of 100m2 of aluminum, 200 flaws are counted.
Which activity (pile driving, tieback drilling, tieback grout curing, or lagging installation) requires no direct labor, but constitutes a timely process that must be accounted for in the project schedule?
Find the expanded depth of the bed after the backwash when initial depth of the bed is 3 ft using given conditions. m = 0.01g/cm/sec, T = 25oC, rs = 2.65, r=1, washrate = 1.5 cm/sec, ks2 = 196.
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