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Facultative stabilization ponds with a total surface area of 6.0 ha serve a community with a waste discharge of 530 m cubed/d at a BOD of 280 mg/l. Calculate the BOD loading and days of winter storage available between the 0.6 and 1.5 m depths, assuming a daily water loss of 0.30 cm by evaporation and seepage.
Derive an equation that allows you to compute the diameter of the drain hole for a desired steady water height in the tank for the design condition inflow and pumping rates.
Phenol undergoes a first-order decay reaction in the CSTR with rate constant, k = 0.50 hr^-1. The current industrial pre-treatment permit for Phenol is 20 mg/l. The permit limitation may be changed, either higher or lower, in the future.
If the superelevation is .10 at the station of the PC is 17+35, what is the station of the PI and how much distance must be cleared from the center of the lane to provide adequate stopping sight distance
For an unknown alloy the stress at which plastic deformation begins is 400MPa and the modulus of elasticity is 120GPa. If the original specimen length is 76 mm, what is the max length to which it may be stretched without causing plastic deformatio..
Which process requires more energy: completely vaporizing 1 kg of saturated liquid water at 1 atm pressure or completely vaporizing 1 kg of saturated liquid water at 8 atm pressure
Each month the speedy dry Cleaning company buys 1 barrel (0.160 m^3)of dry cleaning fluid . Ninety percent of the fluid is lost to the atmosphere and 10 percent remains as residue to be disposed of.
Assuming constant acceleration, determine how long the train blocked the crossing. Dis- regard the width of the crossing.
The door of an oven has 27.9lb weight that acts vertically through point D. The door is supported by a hinge at point A and two springs that are symmetrically located on each side of the door.
A steel tank hold 120 ft^3 of water at atmospheric pressure(14.7psi and 68.4 degrees f). the water is subjected to a 100 fold increase in pressure. determine the initial weight and final density of the water if the volume decreases by .545 ft ^3.
A level is set up midway between two wood stakes that are about 300 feet apart. The rod reading on Stake A is 9.65 ft and the reading on stake B is 4.23 ft. The level is then set up 6 feet in front of stake B.
Employing the ideal gas model with constant specific heat ratio k, determine the temperature at the end of the process and the amounts of work and the heat transfer per unit mass in Btu/lb
Determine how many years from now the consumption will reach its design capacity with current usage rates if the community has a declining growth rate.
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