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A fluid of density rho flows steadily downward between the two vertical, infinite, parallel plates. The flow is fully developed and laminar. Make use of the Navier Stokes equation to determine the relationship between the discharge and the other parameters involved, for the case in which the change in pressure along the channel is zero.
Primary treatment removes ~25 percent of the BOD. Calculate the volume (m3) and approximate hydraulic retention time (h) of the aeration basin required to run the plant as a "high rate" facility (F/M = 2 kg BOD/kg MLSS-day).
Let event Y be a rainstorm on a given day and event X be lightning on a given day. Let probability of these events be: P(X)=0.3 P(Y)=0.1 P(Y|X)=0.5 What is the probability that both rain and lightning occur on a given day
Due to the intended service use, the forklift's market value drops 20% of its prior year's value in Years 1 and 2 and then declines by 15% until Year 10 when it will have a scrap/market value of $1000.
Force F with magnitude indicated acts at point o. determine the magnitudes of the components Faa and Fbb along directions a-a and b-b so that F=Faa+Fbb
A subsurface detention basin is installed beneath a street to help prevent flooding. Water from the rain is chanelled into the basin and begins to infiltrate into the ground when it reaches 1ft.
a rectangular clarifier with a length:width ratio of 3:1 receives a flow of 850m3/day. the clarifiers depth is 4.0m and the detention time of the water inthe clarifier is 2.4 hrs, what are the surface overflow rate and the horizontal flow through ..
The cost for maufacturing a component used in intelligent interface converters was $23000 the first year. The company expects the cost to increase by 2% each year. Calculate the presence worth over a 5 year period at an interest rate of 10% per ye..
How many tons of asphalt concrete will be required to overlay a 3-mile-long, 24-ft.-wide road with 2.5 in. of wearing course asphalt concrete that has a density of 146.3 pcf
Air at 200 kPa and 950 K enters an adiabatic nozzle at low velocity and is discharged at a pressure of 80 kPa. If the isentropic efficiency of the nozzle is 92%, determine the temperature and velocity of the air at the exit.
If 100 acres of farmland were developed for urban housing (four houses per acre), what would be the difference in average annual water requirements after the change over
A fluid in an aquifer is 23.6m above a reference datum; the fluid pressure is 4390 N/m2. The fluid density is 0.999E3 kg/m3. What is the total energy per unit mass What is the total energy per unit weight
Lab studies have shown that the rate constant associated with the process are as follows: k = 0.95 mg COD/mg VSS-day; Y = 0.48 mg VSS/ mg COD, half-saturation K = 85 mg COD/L; ke = 0.07 d-1.
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