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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.
the hull of a boat has a volme of 150m and the total mass of the boat when empty is 8560kg. determine how much load this boat can carry without sinking in a lake.
A differential leveling loop started and closed on BM Juno, elevation 5194.02 ft. The BS and FS distancces were kept approximately equal. Readings (in ft) listed in the order takken are 9.65, 2.11, 2.51, 8.35, 2.06, 9.25, 7.93, 2.83, 5.05, and 4.6..
The outer surface of the tank is cooled by air at 300 K with a heat transfer coefficient of 100 W/m2K. Determine the maximum temperature in the tank. Take the thermal conductivity of the wastes as 2.0 W/mK.
The design discharge is 9.5 m^3/sec and the inlet will be submerged but not the outlet. Determine the depth that will result upstream (above the invert) during the design flood event.
Two toll booths are open and each can process arrivals (collect tolls) at a mean rate of 12 seconds per vehicle ( the processing time is also exponentially distributed). What is the total time spent in the system by all vehicles in a 1 hour period
An airplane flies at a speed of 360 mph at an altitude of 5000 ft. If the boundary layers on the wing surfaces behave as those on a flat plate, estimate the extent of laminar boundary layer flow along the wing in feet.
To what maximum angle, measured from vertical, does the rod (with the attached ball of clay) rotate?
Determine the mass flowrate through boiler needed to produce 5000KW of power.
Does Bernard have an unfair advantage over firms having designed the project on which he wants to bid?
A four lane freeway (two lanes in each direction) operates at capacity during the peak hour. It has 11-ft lanes, 4-ft shoulders, and there are three ramps within three miles upstream of the segment midpoint and four ramps within three miles downst..
what is the difference between factor of safety in rankine & coulomb in overturning, sliding and bearing capasity ?
The number of vacancies in some hypothetical metal increases by a factor of 4 when the temperature is increased from 1090 K to 1140 K. Calculate the energy (in J/mol) for vacancy formation assuming that the density of the metal remains the same ov..
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