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The two-pond system shown below is fed by a stream with a flow rate of 1.0 MGD and a non-conservative pollutant concentration of 20.0 mg/L. The rate of biological consumption is 0.3 day-1. Find the pollutant concentration leaving each pond if the volume of the first is 5.0 million gallons and the volume of the second is 3.0 million gallons.
A conical tube of length 8 m fixed vertically with its smaller end upwards. The velocity head and pressure head at upper ends are 1.27 m and 2.50 m respectively. The velocity head and pressure head at lower ends are 0.203 m and 5.407 m respectivel..
A 440 -V shunt motor has armature resistance of 0.8 ohm and field resistance of 200 ohm . determine the back emf when giving an output of 7.64 KW at 85% efficiency
Imagine two small towns of 1,000 people: Blacktop and Parktown. In the urban sprawl that is Blacktop, all the residents own fuel-efficient cars (15 km/liter) and travel an average of 20,000 km per year.
Assuming you had the necessary inputs to get a numerical value for both C and D, how might your numerical answers for both C and D vary if the polymer tensile member is located in Michigan versus Texas? Why?
How many extractions are required to decrease the concentration of phenol below 100 mg/L in a wastewater containing 2000 mg/L of phenol if an ether-to-watewater ratio of 0.2 by volume is used in each extraction
Consider a house into which radon is emitted through cracks in the basement. The total volume of the house is 650 m3 (assume that the volume is well mixed throughout).
What is the maximum column load in kips that could be placed on a 4-ft square temporary footing on a sand for which the standard resistance is about N=15 and the water table is at the surface
A scientist plans to build a water barometer. When the atmospheric pressure is 990 mb abs and the water temperature is 70 degrees Celsius, what would you expect the barometer reading (water rise) to be?
a. Use algebra and linearity of the expectation operator to find the answer. b. Explain how the transformation affects the drawing of the scatterplot we used to develop our understanding of covariance, and therefore why the answer to part a. shoul..
Determine the minimum length of a crest vertical curve if the grades are +4% and -2%, Design speed is 70 mi/h
In one observation well water stands 28.8 ft above the bottom at a radius of 687 ft, and in the other it stands 22.5 ft above the bottom. What is the discharge per 100 foot wide strip of the aquifer in square ft per day
A system consists of liquid oxygen in equilibrium with oxygen vapor. How many phases are present. The system undergoes a process during which some of the liquid is vaporized.
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