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Determine the rate of ammonia (NH4-N) utilization and the biomass growth rate for the following conditions:
µm = 0.50 g VSS/g VSS-d
Ks = 0.50 mg/L
X = 10 mg/L
S = 40 mg NH4-N/L
Y = 0.12 g VSS/g NH4-N
kd = 0.01 d-1
Consider a cantilever mass-less beam subjected to a concentrated mass at the tip of the beam. Assume, length L, flexural stiffness EI, and mass m.
A driver is travelling at 50 mi/h on a wet road. An object is spotted on the road 500 ft ahead and the driver is able to come to a complete stop just before hitting the object.
Why is it necessary to require such conditions-sand cement ratio, w/c ratio and type of sand. A graded sand is specified for use in the mortar cube test. What would be the likely results if a one-sized sand was used instead of a graded sand.
A power plant operates at steady-state. It receives energy from a hot source (combustion of fuel) at a temperature of 420 oC. The plant discharges this energy to a nearby river that acts as a cold source.
At the end of 15 years, the first motor will have a salvage value of $50 and the second motor will have a salvage value of $100. consider the MARR to be 8%. (note : 1HP=0.7457 kw). Determine which motor should be installed based on the PW criterio..
During the summer months (December - March), the town population increases to 9,000 people due to holiday makers. The population growth rate was expected to be 1.5% per year
What is the concentration of NH3 (in mg/L) of household ammonia that contains 3.00 percent by wieght of NH3. Assume the density of water = 1000kg/m^3
A sample of mortar fills a900 ml beaker. The mortar and beaker combined weighs 3 lb and the empty beaker weighs 2 oz. What is the weight density of this mortar sample?
A well mixed sewage lagoon is to be constructed to process 100,000 gallons per day of raw sewage. The pollutant concentration in the raw sewage to be discharged into the lagoon is 200ppm.
Find the magnitude of the velocity and acceleration for the point having the coordinates (3,4). Specify units in terms of L and T.
Consider an air bubble rising from the bottom of a lake. Neglecting surface tension, determine approximately what the ratio of the density of the air in the bubble will be at a depth of 34ft to its density at a depth of 8 ft
A wastewater treatment plant must disinfect its effluent before discharging the wastewater to a near-by stream. The wastewater contains 4.5*105 fecal coliform colony-forming units (CFU) per liter.
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