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A water treatment plant has 6 settling tanks that operate in parallel (the flow gets split into six equal flow streams), and each tank has a volume of 600 m3. If the flow to the plant is 10 MGD, what is the retention time in each of the settling tanks? If, instead, the tanks operated in series (the entire flow goes first through one tank, then the second, and so on), what would be the retention time in each tank?
Calculate Earth's gravitational force on the Shuttle astronauts while orbiting at an altitude of 220 miles (or 354 km) above Earth's surface.
Assuming D/D/1 queuing, what will be the total vehicle delay?
it is required to dewater a construction site 80 m by 80 m. the bottom of the construction will be 1.5 m below the
The moduli of elasticity of plain concrete and steal are 25 GPa and 207GPa respectively, and the corss-sectionial area of steel is 2% of that of the reinforced concrete.
Estimate how much carbon (in pounds) must be purcahsed for a typical 2-bed carbon adsorption system to treat 5000 cfm of air at 95 degrees F and 1 atm. The air contains 600 ppm of styrene.
Sacramento Cab Company owns several taxis that were purchased for $25,000 each 4 years ago. The cabs' current market value is $12,000 each, and if they are kept for another 6 years they can be sold for $2000 per cab.
Compact fluorescent light (CFL) bulbs have been avaiable for years; they are bery efficient but a little pricey. A CFL bulb that puts out as much light as a 60-W incandescent bulb might costs $10, compared to about $1 for the incandescent bulb. But C..
Three cylinders from the same mix were tested for strenght. Cylinders A and B were cast in 4x8 molds while cylinder C was cast in a 6x12 mold. The total loads were as follows; cylinder A= 65,200 lbs., cylinder B= 68,550 lbs., cylinder C= 151,190 l..
the unit weight of normal weight reinforced concrete is commonly assumed to be 150 lb/ft cubed. find the weight per lineal foot (lb/ft) for a normal weight reinforced concrete beam that: a. has a rectangular cross section 16 in.
What is the maximum length of trench that can be excavated by hand economically rather than by a trenching machine. It will cost $900.00 to transport a trenching machine to the job and back to the storage yard.
The beam ABC of length L has two different moments of inertia (2I in AB, I in BC) and a constant elastic modulus E. It is fixed at point A has a roller support at point B and a load P at C. a. Sketch the deflected shape of this beam.
A previously calibrated rotometer is being used to measure a gas flow. Calculate the true volumetric flow rate of methane in the rotometer whe. The rotometer reads 4.0.
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