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The total flow at a wastewater-treatment plant is 600 m3 day-1. Two bio-logical aeration basins are used to remove BOD from the wastewater and are operated in parallel. They each have a volume of 25,000 L What is the aeration period of each tank in hours?
A tangent section of highway has a -1.0% grade and ends at station 4+75 and elevation 82 ft. It must be connected to another section of highway that has a -1% grade and that begins at station 44+12 and elevation 131.2 ft.
State the assumptions of Rankine's theory as used in foundation
Ozone is sometime used as a disinfectant for drinking water. Ozone is highly reactive it will react benign species found in water, as well as the pathogens it is intended to kill.
An engineer in a developing country observes that his project bankaccount has grown from 1,600,000 to 1,769,279 (local currencyunits) in 20 days with no deposits or withdrawals being made. He knows the account interest is compounded daily.
A carpenter uses a hammer to strike a nail. Approximate the hammer's weight of 1.8lbs, as being concentrated at the head, and assume that at impact the head is traveling in the -j direction
What is the minimum distance from the stalled car at which the driver could apply the brakes and still stop before hitting it? Assume coefficient of rolling resistance of 0.013.
Detennine (1) the required shaker frequency to cause "resonance" and (2) the dynamic magnification ofresponse compared with static response for that level of damping.
The pressure drop in a 10 cm galvanized iron horizontal pipe (ks=.15mm) carrying water over a length of 50 m is 30 kPa. What is the flow rate
Where: Q is the amount of energy added (joules) M is the mass of the fluid (kg) C (subscript p) is the heat capacity of the fluid (joules/kg/K), and Delta T is the change in temperature (K or C degrees) A garage (24 ft x 24 ft x 10 ft) is illuminated..
Oil with a kinematic viscosity of 0.0035ft3/s flows through a 4-in-diameter pipe with a velocity of 15ft/s. What will be the approximate distance from the pipe entrance to the first point
The van der Waals constants for carbon dioxide are a = 364.3 kPa · m6/kmol2 and b= 0.0427 m3/kmol.
A constant "flow" of steel parts at 2 kg/s at 20?C goes into a furnace, where the parts are heat treated to 900?C by a source at an average of 1250 K. Find the reversible work and the irreversibility in this process.
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