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Write the mass balance equation for an ideal 1D plug-flow stream under steady state conditions with a first-order decaying substance. Solve for the concentration as a function of the concentration x=0, the rate constant kd, longitudinal distance x, and mean velocity u. Assume the rate constant for BOD decay is 0.2 d^-1, the mean velocity of the stream is 0.5 m s^-1, and the initial concentration is 100 mg L^-1 at x=0. Plot the resulting concentration with downstream distance x in km.
What are 3 of the equivalent fixed-point problems for f(x) = x2 - x -2=0?
A 10cm diameter vertical tank holds 20cm of water topped with 15cm of ethyl alcohol. The cylinder is rotated about its central axis at a rotation rate of 20 rad/s. (a) What will be the shape of the air-alcohol and alcohol-water interfaces (include ..
the 3.5mg engine is suspended from a 500 kg spreader beam and hoisted by a crane which gives it an acceleration of 4m/s^2 when it has a velocity of 2m/s. determine the force in chains AC and AD during the lift.
The plate is submerged in a liquid is a vertical position with the parallel sides horizontal and the shorter parallel side at the top and exactly in the surface of the liquid. The static moment of the plate with respect to the surface of the liqui..
Calculate the fraction of total atrazine that will be adsorbed to the soil given that the soil has an organic carbon content of 2.5%. The bulk density of the soil is 1.25 g/cm3; this means that each cubic centimeter of soil (soil plus water) conta..
Lake levels have been measured for the past 50 years at Cagles Mill Lake. The highest annual lake levels (in feet, mean sea level) on record are 887.5, 887.3, 886.5, 886.0, 885.9. The other 45 annual peaks are smaller.
determine the angular acceleration of the spool and the acceleration of the trailer. The wheels have negligible mass and are free to rotate.
an increment of vertical stress of 150kpa compress the sample to a void ratio of1.43. what is the over consolidation ratio of the soil at the unloaded condition.
Suppose there were reason to believe that incomes in some population were normally distributed, with a mean of $47,000 per year, and a standard deviation of $5,500 per year.
I want to use PESTAN model for a project, can you please tell me any real scenario with available data on which I can formulate a project preferably related to oklahoma.
A 5000 m3/day wastewater treatment plant discharges to a river with a minimum drought flow of 140 m3/min (upstream of outfall) a)What total allowable BOD (kg/day) could be discharged by the plant if the BOD in the river after initial dilution must ..
explain the necessity of super elevation in the design of horizontal curve also prove that rv=v2/{g(fs+e)}
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