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A structure is designed with a factor of safety of 5.25 psi. If the allowable stress of the structure is 3000 psi. What stress on the structure will lead to its failure?
A water supply system is being designed to serve a population of 200,000 people with an average per-capita demand of 600L/Person-day (peak demand factor is 1.8) and a needed fire flow of 28,000 L/min.
Could all the people in china hold back the water behind the three gorges dam?
A two-stage trickling filter plant treats 291.7 m3/h of municipal wastewater that has a BOD5 of 200 mg/L. The two filters have equal dimensions (depth = 1.68 m; diameter = 21.3 m), and each has a recycle ratio of 1.0
Determine the maximum displacement of the plate A if the billet strikes the plate with a speed of 8 . Neglect the mass of the springs, rollers and the plates A and B. Take = 4000 , = 40000 .
Consider a $50000, 30 years loan at 12% APR with monthly uniform payments. What portion of the 263rd payment goes towards reducing the principal and what portion is interest
Items are inspected for flaws by two quality inspectors. If a flaw is present, it will be detected by the first inspector with probability 0.9, and by the second inspector with probability 0.7. Assume the inspectors function independently.
A glass tube with inside diameter of 2-mm is inserted vertically into a dish of mercury at 20°C. Determine the difference in mercury levels inside and outside the tube.
two wooden members of uniform rectangular cross section of sides a = 100 mm and b = 60 mm are joined by a simple glued joint as shown. knowing that the ultimate stress of the joint are 1.26 MPa in tension and 1.50 MPA in shear and that P= 6kN
In a water table aquifer bounded on the ends by rivers, the hydraulic conductivity is 50 m/day. The hydraulic heads at x = 0 and x = 1000 m are 100 m and 90 m, respectively.
The stream has a naturally occurring NaCl concentration of 20 mg/L. If the storm sewer flow rate is 2000 L/min and the stream flow is 2.0 m^3/s, what is the concentration of salt in the stream after the discharge point
What are the effects of water pollution on the components of the hydrologic cycle?
what is the distiniction b/n point and non point sources of water pollution and thier varation with surface and ground water?
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