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An equal-tangent crest vertical curve is designed for 60 mph. The initial grade is +4.0 and the final grade is negative. What is the elevation difference between the PVC and the high point of the curve?
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. If the primary clarifier removes..
Truck B has an 8000-lb single axle and a 43,000-lb tandem axle. On a flexible pavement with a 3-inch hot-mix asphalt (HMA) wearing surface, a 6-inch soil-cement base, and an 8-inch crushed stone subbase, which truck will cause more pavement damage
A sedimentation basin is used to remove suspended solids from a wastewater. The rate of flow of wastewater into the tank is 10 L/s, and the influent concentration of suspended solids is 200 mg/L.
Draw block diagrams of the unit operations necessary to treat the following wastes to effluent levels of BOD5 = 200 mg/L, SS = 100 mg/L, P = 5 mg / L (required for discharge into a sanitary sewer).
For the free-falling patachutist with linear drag, assume a firstjumper is 70 kg and has a drag coefficient of of 12 kg/s. If a second jumper has a dragcoefficient of 15 kg/s and a mass of 75 kg, how long will it take him to reach the same velocity t..
At what depth would the vertical effective stress in a deep deposit of clay be 100 kpa, if e=1.1? The ground water level is a 1 m delow ground surface and S=95% above the groundwater level. Neglect pore air pressure.
A company has submitted plans for a hydrogen sulfide (H2S) scrubber.H2S is to be removed from the waste air discharge by scrubbing with a dilute
Consider some hypothetical X+ - Y - ion pair for which the equilibrium interionic spacing and bonding energy values are 0.38 nm and - 6.38 eV respectively. If it is known that n in the equation has a value of 10, determine the expressions for attract..
a water main is used to refill an elevated storage tank during the night. a 100 ft long, 12 in steel pipe (ks=.06 mm) connects to the booster pump that provides a pressure of 75 psig at the pump outlet
What is the contact time (min) required to achieve a log-3 deactivation of Giardia in water of 10 °C temperature, at pH 7, if the chlorine concentration is 2.2 mg/L?
how do you find the force ratio equation to determine the maximum total load that can be applied to a truss?nbspgiven a
The moment of the force F about the x-axis is 1080 N · m. Determine the moment of F about the axis AB.
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