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Problem: A 30-cm diameter well is pumped at a constant rate in an unconfined aquifer with a hydraulic conductivity of 3.0 m/day. Before the well was installed, the regional water table had a constant elevation of 200 m. After pumping began, the system reached a state of equilibrium in which the elevation of the water table at the well itself was 180 m. At a location 0.5 km away from the well, the water table is undisturbed. If the bottom of the aquifer is at an elevation of 130 m, what is the steady state pumping rate in m3/day?
A human with a surface area of 2 m^2 and a surface temperature of 27 degrees celcius radiates into a large room (which acts as a black body),
A small city is evaluating disinfection requirements for their drinking water plant. With an average flow of 5 MGD and a peak flow of 9 MGD, determine the controlling CT factor (virus or giardia
The 5.5 Mg humpback whale is stuck on the shore due to changes in the tide. In an effort to rescue the whale, a 12-Mg tugboat is used to pull it free using an inextensible rope tied to its tail
A supervisor is sitting at her desk illuminated by a 180 candela source 3 feet above it. She is writing with green ink (reflectance=30%) on a yellow note pad (reflectance=60%). What is the illumination on the note pad?
Consider an ideal gas refrigeration cycle using helium as the working fluid.
If you had to build a computer out of just one type of gate, would the NAND gate be preferred over the AND gate? Why or why not?
Calculate the critical radius and the number of atoms in the nucleus of the homogeneous nucleation in GERMANIUM. The latent heat of fusion is 8100 cal per g-mile (atom) and the coefficient of linear expansion is 5.75*10^-6 per K
Develop a plan to demolish the existing dwelling shown on the site plan in accordance with the legislative and planning - Prepare a simple sketch of a section
A 200-mm-deep hole that is 30 mm in diameter is being produced by electrochemical machining. A high production rate is more important than machined surface quality. Estimate the maximum current and the time required to perform this operation.
Given the initial effective stress state at a point within a soil mass (s_y=2.5 daN/cm2, s_x=1.5 daN/cm2, t_xy=t_xy=0.4 daN/cm2) and effective soil shear strength parameters at the same point
A soil borrow material in its natural state in the ground has a unit weight of 86 pcf. Its natural water content is 9%. What is the dry weight of this material
in an air standard otto cycle , the air at the beginning of the compression stroke is at 95 kpa and 22c ,and the cylinder volume is 0.0028 m^3 . the compression ratio is 9 and 4.3 kj are added during the heat addition process
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