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A well installed into a confined aquifer with a porosity of 0.3 and saturated thickness of 80 ft. The gravel pack requires a well screen slot width of 0.025 inches. The hydraulic conductivity of the aquifer is 60 ft/d. The radius of influence is 1200 ft and the hydraulic head at the radius of influence is 520 ft. The maximum permissible drawdown at the well is 25 ft. Determine the length of the well screen, the diameter of the well screen, the per cent open area of the well screen, the thickness of the gravel pack, the formation drawdown, the well screen drawdown, and the actual entrance velocity. The flow rate from the well should be greater than equal to 96000 ft^3/d. Locate the well screen in the middle of the aquifer formation.
A coal mine's entry and breakthrough centers are set at 60ft with 20ft-wide openings. The 6ft coal seam lies 1,000ft below the suface, and the specific gravity of the overburden is 2.4. If the compressive strength of 4in.
The maximum hoop stress is (65000/2) psi and the maximum shear stress is 16000 psi. If the diameter of the tank is 7 inches,what is the minimum wall thickness.
Using the tables in the AISC manual, make a preliminary selection of member size, using a HSS shape. Do not simple state a choice - state your logic step by step, quoting page numbers (AISC) for each step.
A steel tank with 2.5 m high vertical walls and a flat triangular floor is filled with three immiscible liquids layered upon each other. Two of the walls are 1.2 m long and perpendicular to each other.
The homogeneous gate shown in Fig. P2.88 consists of one quarter of a circular cylinder and is used to maintain a water depth of 4 m. That is, when the water depth exceeds 4 m, the gate opens slightly and lets the water flow under it. Determine the w..
Find the swell for a soil which weighs 1600kg/m in bank and 1300kg/m3 in bank and 1300kg/m3 Loose and what is the shrinkage factor for a mass of soil that takes up 1.5m3 in bank and reduces down to 1.2m3 after compaction
8 Forces of 10.0 N north, 20.0 N east, and 15.0 N south are simultaneously applied to a 4.00 kg mass as it rests on an air table. Determine the magnitude and direction of the object's acceleration.
The relative roughness ofa pipe is 0.0005, if the blasius equation is applicable for Thecflow Reynolds number above 2700 rather then 3000
The acceleration of a particle is defined by the relation a=-8m/s^2. Knowing that x=20m when t=4s and that x=4m when v=16m/s, determine (a) the time when the velocity is zero, (b) the velocity and the total distance traveled when t=11s.
At the end of 15 years, the first motor will have a salvage value of $50 and the second motor will have a salvage value of $100. consider the MARR to be 8%. (note : 1HP=0.7457 kw). Determine which motor should be installed based on the PW criterio..
An industrial off gas steam must be treated for both particulates and SOx. The gas is at 1500 degrees F and 1.5 atm of pressure containing 80 mg/cubis meter of particulates and 25 mg/cubic meter of SOx.
Assume that the width of the intersection in 24 ft and the car is 20 ft long. If the driver's perception-reaction time is 0.75 seconds, determine if he can clear the intersection safely for the following conditions
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