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1.A lake with constant volume 10X10^6 m^3 is fed by a pollution-free stream with flow rate 50 m^3/s. A factory dumps 5m^3/s of a neoconservative waste with concentration 100 mg/L into the lake. The pollution has a reaction rate coefficient K of 0.25/day. Assuming the pollution is well mixed in the lake, find the steady-state concentration of pollution in the lake.
2.We have a situation where hydrogen gas at 300 degrees C is flowing out of a tube at the rate of 100 mL/min. The tube is located in a fume hood operating at 25 degrees C and 1 atm. What is the flow rate of air that must be entering the hood so that the hydrogen gas does not pose a flammability hazard?
calculate the depth of water in a stormwater pond resulting from a two hour rainfall event. the rainfall occurs over a 24-acre watershed at an average rate of 1 inch/hour. the runoff coefficient is 0.5.
Water flows in a circular pipe of diameter D at a depth y (
A trapezoidal channel is to be designed to carry a discharge of 250 cfs at a normal depth of 3.5 ft. The channel is running on a slope of 0.005 ft/ft and the side slopes can be no steeper than 2.5 H on 1 V.
When a net amount of work is done on a closed system undergoing an INTERNALLY REVERSIBLE process, a net heat transfer of energy from the system also occurs.
For a trapezoidal shaped channel (n=0.014 and slope = 0.0002 with a 20-ft bottom width and side slopes of 1:1.5 (V:H), determine the normal depth using trial and error technique for a discharge of 1000 cfs.
The peak-hour volumes at two locations were counted and found to be equal. However, the PHFs were .85 at the first location and .60 at the second. Describe the difference between the two locations if t=5 min.
The top of the object is 1 m below the surface of the fluid. What are the magnitude and direction of the hydrostatic force acting on the top of the object.
The beam over a 3ft wide outside door is to be concrete to support the brickwork above the door. The moment has been calculated to be 4005in-Ibs and the beam is 4 inches wide and 6 inches overall height.
The yield stress for A-36 is 250 MPa. Using factor of safety against yield of 1.25, determine an appropriately sized beam such that the radius of curvature is not less than 140m. E= 200 GPa, G= 77.2 GPa.
Determine the design hourly volume for the road below, recommend the K factor first.
Reciprocal leveling gives the following readings in feet from a setup near A: on A, 2.071; on B, 8.254, 8.259 and 8.257. At the setup near B: on B, 9.112; on A, 2.926, 2.930 and 2.927.
The rapid sand filter being designed for Laramie has the characteristics show below. Determine the head loss for the clean filter bed in a stratified condition. Depth = 0.75 m
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