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Poorly treated municipal wastewater is discharged to a stream. The river flow rate upstream of the discharge point is add 8.7 m35. The discharge occurs at a flow of Qd = 0.9 es and has a BOD concentration of 50.0 mg 1.72. Assuming that the upstream BOD concentration is negligible
(a) What is the BOD concentration just downstream of the discharge point?
(b) If the stream has a cross-sectional area of 10 m2, what would the BOD concentration be 50 km downstream? (BOD is removed with a first-order decay rate constant equal to 0.20 day)
Using the results of part (a), show that the electrons will fail to reach the second plate if (see the attached file for the equation) where -e and m are the charge and mass of an electron.
An overall average of 65,000 lb of water per 24-h day must be evaporated during each 30-day period. (b) An overall average of 81,000 lb of water per 24-h day must be evaporated during each 30-day period.
With a load of 0.8 power factor lagging, what kVA load can be supplied without exceeding the current rating of any winding? Determine the efficiency at this load.
Estimate the heat-transfer coefficient for steam condensing on the outside, and on the inside, of a 25 mm o.d., 21 mm i.d. vertical tube 3.66 m long. The steam condensate rate is 0.015 kg/s per tube and condensation takes place at 3 bar. The steam..
Pyrolysis of Ethane proceeds with an activation energy of 70000 calories. How muchfaster is the decomposition at 650oC than at 500oC?(Dec-2004 & 2005-Bio)
Lowest standard deviation of measurements, As the Quality Control Manager of a chemical company, you are asked to decide between several process methods that are supposed to uniformly mix 37.4 milligrams into a chemical solution.
__________ is the response curve for a step input signal from a reactor. 1. S-curve 2. C-curve
Sphere A is moving at a speed Vo=16 ft/s when it strikes sphere B which is at rest and the impact causes sphere B to break into two pieces, each of mass m/2 Knowing that 0.7s after the collision one piece reaches point C and 0.9s after the collisi..
Into a barrel containing 33.2 bbl (US) of water containing 0.0012 mol/L of a blue dye you pour V2 yd3 of water containing 8.91 M of the dye. The final concentration of the dye in the barrel is 7.91 mol/m3 after it's well-mixed. What is V2 is yd^3?
To show the effect of boiler pressure on the performance of the cycle, calculate the thermal efficiency of the cycle and the quality of the exhaust steam from the turbine for boiler pressures of 5000,7500, and 10 000 kPa.
Compute the effective armature ac resistance in per unit and in ohms per phase at 25°C.
Draw a block diagram to show the negative feedback mechanisms that help regulate glucose levels in the blood. Label the inputs, sensors, integrators, effectors, and outputs.
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