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A non-reactive chloride solution is continuously discharged into an aquifer. The concentration at the discharge location is 800 mg/L. A) Determine the maximum concentration of chlorides to be observed at an observation well 30 m downstream of the discharge location, B) Plot the time-history of chloride concentrations at the observation well C) Determine the time at which a chloride concentration of 5 mg/L is expected at the observation well, and D) determine the first time at which the chloride concentration at the well is within 1% of the maximum concentration identified in part A. The aquifer properties are: K = 4.3 x 104 n/s,dh/dl = 0.0005, effective porosity = 0.23, and the effective diffusion coefficient = 0.8 x m2/s. Hint: The complimentary error function is available with the Analysis Tool pack Add-in for Microsoft Excel. However it cannot handle negative inputs.
A 8 inch polyethylene pipe has a flow rate of 1000 gallons/minute with a linear length of 10000ft. Starting at elevation 200ft then ends at 600ft elevation. Initial pressure is 40 psi. find the friction and the head loss.
What ethical problems might these conflicts create? How are these two different ethical codes tied to public perceptions of the role of law enforcement?
Cork is used for sealing sparkling wine bottles. Aside from friction, why not use rubberbto seal wine bottles. (Hint: think about the force exerted by the pressure inside and how does that deform each material) Be sure to use poissons ratio in the..
A 2 foot tall multi-stage weir placed in a channel to cause the water to flow over the contracted weir at a height of 0.75 feet. There are 2 contractions and the original length is 6 feet. What is the discharge, in cubic feet per second
Two particles start from the same point along the same straight line and at the same instant. The first particle travels with a constant velocity v and the second with a constant acceleration.
One of the wells pumps at a rate of 1,240 m^3/ day. The second well pumps at 850 m^3 / day. If the aquifer has a T= 2000m^2 / day and a storage coefficient of 0.0004, when would the wells start interfering each other
If the time required to pay for parking is exponentially distributed with a mean of 15 seconds, find the average time in system.
Calculate the Air flow required in CFM to transfer 5,396 BTU/Hour in an HVAC duct given that the temperature difference (Delta-T) between the room and the supply air is 21 DegF.
The hypothetical velocity distribution in a horizontal, rectangular open channel is V=0.3y (m/s), where V is the velocity at a distance y (m) from the bottom of the channel. If the vertical depth of flow is 2 m and the width of the channel is 4 m,..
a circular steel tube of length L=1.2m is loaded in torsion. If the inner radius of the tube is 45 mm and the measured angle of twist between the ends is 0.4 degrees, what is the shear strain at the inner surface
Water flows steadily through a horizontal nozzle. The nozzle inlet diameter is 6 in. At the nozzle outlet, where the pressure is atmospheric, the diameter is 2 in. Determine the pressure head at the nozzle inlet to produce a water jet velocity of ..
Online professor's response to: Probability problems, A very rich investor has a small amount of spare cash which she wishes to invest. She has four options to choose from.
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