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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 is the engineering ethics case related to civil engineering with reference and discuss all the engineering ethics issues which covered the "Engineering etics concepte and cases?
If you were asked to perform an excavation contract competitively with limited data, what type of contract would you want and why?
Water flows through a horizotal 45 deg reducing bend with a 36 inch. diameter upstream and a 24 inch diameter downstream, at the rate of 20 cfs under a pressure of 15 psi at the upstream end of the bend. Neglecting head loss in the bend, calculate..
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.
You have been assigned to design a heat exchanger to cool a gaseous process stream in a chemical plant. The stream flow at 20 kg/s and enters at 431 oK, It has a heat capacity of 3.45 J/g-oC , and needs to be cooled to 402 oK.
Cancer is the uncontrolled growth of abnormal cells in the body resulting in tumours that can be benign or malignant (cancerous cells). A proper treatment is necessary to fight with this serious disease.
Lines of levels were run requiring n instrument setups. If the rod reading for each backsight and foresight has a standard deviation δ what is the standard deviation in each of the following level lines?
Determine the maximum and minimum stress intensities in the section.
Explain how the presence of the collimation error, e, can be detected in a "Two Peg Test" operation.
inability and green engineering can be integrated in the four components of materials science and engineering?
Photovoltaic array, Under insolation conditions of 500 W/m^2 (direct sunlight), and 10% solar cell efficiency
Determine the maximum displacement of the plate A if the billet strikes the plate with a speed of 8 . Neglect the mass of the springs, rollers and the plates A and B. Take = 4000 , = 40000 .
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