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Two groundwater wells are located 100 m apart in permeable sand and gravel. The water level in well 1 is 50 m below the surface, and in well 2 the water level is 75 m below the surface. The hydraulic conductivity is 1 m day-1 , and porosity is 0.60. What is
(a) The Darcy velocity, υd = Q/A?
(b) The true velocity of the groundwater flowing between wells?
(c) The period it takes water to travel between the two wells, in days?
The article "Statistical Evidence of Discrimination" (Journal of the American Statistical Association, 1982, pp.773-783) reported that, prior to 1965 in a southern state, 25% of those eligible to serve on a grand jury were black
The ultimate consolidation of a 13-ft thick single-drained clay layer (cv = 0.1 ft2/day) was calculated to be 0.813 feet. How much settlement would you expect after 10 months?
For some minerals color is a diagnostic property making identification rather easy. However, certain minerals can also occur in a wide variety of colors making color a poor tool for identification. List different colors for the mineral quartz lo..
A pipe is to be installed under the ground on a bed of aggregate 6 in. thick. The entire weight on the aggregate from pipe and soil above the pipe is 1800 lbs. per linear foot of pipe. What is the pressure on the soil if theta is 45 degrees? Assum..
A simple highway curve is planned to connect two horizontal tangents that intersect at sta. 2500 + 00.0 at an external angle of 52 degrees. For a design speed of 60mi/h and a curve radius of about 1.25 times the minimum allowable
Ecocity has two potential sources of water supply: groundwater and a small river fed by a mountain spring. The river supports a lot of fish and other wildlife, so the citizens do not want to use any more of it than necessary. Unfortunately, however, ..
For turbulent flow in a circular pipe find r/r0 at the radial distance from the centerline where the mean velocity occurs
A closed tank having a volume of 1.0 ft3 is filled with 0.15 lb of a gas. A pressure gage attached to the tank reads 12 psi when the gas temperature is 80 F. There is some question as to whether the gas in the tank is oxygen or helium.
Calculate the force (in Kn) a punch press must exert if it is to punch out a large washer from a strip of 5-mm thick sheet steel with an ultimate shear strength of 400 MPa. The washer dimensions are as follows: hole diameter is 27 mm. outside diam..
By tracing the path of an impulse through the flowgraph, determine y[1] for input x[n] = δ[n].
mechanical oscillations can be described in general by the following function: y(t)= e^(-t/m) *sin(wt+phi). where (t) is time and (w) is the oscillation angular frequency in radians per unit time.
An intake conduit from a well field used to pump ground water is being designed for a town with a population of 23,000 people. Six years ago the population was 21,500 people. a) assuming deometric growth, calculate the population in 50 years
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