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A BOD test was conducted on the unchlorinated effluent of a municipal treatment plant. The wastewater portion added to a 300 mL BOD bottle was 8 ml. The dissolved oxygen values and incubation periods are listed below.
a. Determine the 5-day BOD value. (BODs = 178 ppm)
b. Given a rate constant of 0.2 day^-1, calculate the ultimate BOD.
c. Plot the theoretical vs. actual BOD vs. time on excel. The x-axis should be time and should go from 0 to 25 days. The actual data points should be represented by points while the theoretical BOD vs. time should be represented by a line. Please label both axes and provide a title for the graph.
A large company in the communication and publishing industry has quantified the relationship between the price of one of itsproducts and the demand for this product as Price = 150- 0.01 x Demand for an annual printing of this particular product.
A 1.10% Carbon hypoeutectoid plain carbon steel is slowly cooled from 900 degrees C to just slighty below 723 degrees C calculate the weight percent proeutectoid cementite present in this steel.
Carbon dioxide flows in a 75 mm diameter PVC pipe at 0.014 kg/s at a pressure of 345 kN/m^2/s abs and a temperature of 10 degrees C. Calculate the head loss in 500 m of pipe.
Knowing that the collar is releasted from rest at A, develop an equation to determine the velocity of the collar at point B for any given value of k (k-range is 0.1-2.0 lb/in)
if 25 acres of land recieved 3.5 inches of water from the irrigation district, determine volume of water on the land in acre-ft
If the heading of a member function of a class ends with the word const, then the function members cannot modify the private member variables, but can modify the public member variables.
A beam with a total length of 14m, has a 1000N load on the left end, 4m to the right (from the left end of the beam) there is a rolarr, 2m to the right of the rolar begins a 300 N/m load that goes for 4m, and the last 4m has a tapered load of 300 ..
A steady-flow compressor is used to compress helium from 15 psia and 70oF at the inlet to 200 psia and 600oF at the outlet. The outlet area and velocity are 0.01 ft2 and 10 ft/s
Consider a house into which radon is emitted through cracks in the basement. The total volume of the house is 650 m3 (assume that the volume is well mixed throughout).
The allowable shearing stress is 15 ksi in the steel rod AB and 8 ksi in the brass rod BC. Knowing that the torque of magnitude T=10 kip * in. is applied at A, determine the required diameter of a) rod AB, b) rod BC.
Write the equations for shear and moment between support A and B (Selection the origin at A) and Draw the S . F .D) and B.M D with peak values indicated in the diagrams.
The flow through an 8 ft. Parshall Flume is 129 cfs when Ha is 2.50 ft. Determine the downstream water level (Hb) that would produce this flowrate.
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