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Question:
Two pumping wells 1,000 m away fully penetrate the same confined aquifer. One of the wells pumps at a rate of 1,240 m3/day. The second well pumps at 850 m3/day. If the aquifer has a transmissivity of 2,000 m2/day and a storage coefficient of 4 x 10-4, when would the wells start interfacing with each other?
The motion is described by the second Newton's law: m(d^2y/dt^2) + a(dy/dt) + ky = 0 where y is the body displacement in m, t is the time in s, a > 0 is the friction coeffcient in kg/s and k is the spring constant in kg/s2.
Truck B has an 8000-lb single axle and a 43,000-lb tandem axle. On a flexible pavement with a 3-inch hot-mix asphalt (HMA) wearing surface, a 6-inch soil-cement base, and an 8-inch crushed stone subbase, which truck will cause more pavement damage
Water is flowing at a velocity of 10 ft/sec and a depth of 10ft in a channel of rectangular section. Find the change in depth and in absolute water level produced by
If the fre- quency of simple harmonic motion is 13/pi cycles/s, what is the spring constant k What is the frequency of simple harmonic motion if the original mass is replaced with an 288 pound mass
If the allowable shear stress is 100 MPa, calculate the maximum shear force V that a W460 X 60 structural steel wide flange is capable of resisting. Use the average web shear approach.
Given the stationing in meters as (4+56) for the PC of a horizontal curve of radius R=1200 meters and angle I=22°. The azimuth of the line PC to PI as AzPC-PI = 155° 30'. A point P is to be located on the curve at stationing of 7+00.
All the members of the symmetrical rigid frame shown in Figure S11.2 are of uniform section. Determine the value of W at which elastic instability of the frame occurs in its own plane.
A circular beam length 36 inches and diameter 1 inch is supported on the left end by a pin joint and the right end with a roller. The beam is under axial tension with forces of 1000 lbs out of each end.
Determine the volume of three identical activated sludge tanks following primary clarification to aerate 36,000 m cubed/d with a BOD concentration of 180 mg/l at a BOD loading of 560 g/m cubed*d.
You are the project manager for an organisation that aims to use drones in the future for the delivery of its products in New Zealand - discuss how some of the potential concerns associated with drone delivery can be addressed and mitigated throug..
Assume the cycle in Problem 9.51 has a condenser operating at 20 kPa. What would the quality at the turbine exit be? Find the reheat temperature if reheat is at the 4 MPa extraction pressure and if the turbine should have a minimum quality of 90%.
What DO will result if the concentration of the waste(Lw) is reduced by 50%? Assume that the flows remain the same and that the saturation value of DO is 10.83 mg/L in both cases.
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