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a) A CMFR is to be designed to remove contaminant A from water with a steady-state efficiency of 95 percent. The decay reaction is zeroth order, with a rate constant of 0.1M/h. The inlet concentration of A is 0.5 M. What hydraulic detention time is required to achieve the desired efficiency?
b)another CMFR is to be designed to remove contaminant B from water with a steady-state efficiency of 95 percent. The contaminant is consumed by a second-order decay reaction with rate constant of 0.004/(M)(S). The inlet concentration of B is 0.5 M, and the flow rate of water that must be treated is 0.3 m^3/s. How large must the reactor be?
A runs slope a distance of 156.777 m from one point to another point at a rate of +1.5%. What is the corresponding horizontal distance between the points?
A disabled automobile is pulled by means of two ropes as shown. The tension in AB is 400 lb and the angle is 20. knowing that the resultant of the resultant of the two forces applied at A is directed along the axis of the automobile, determine by ..
A soil specimen has a water content of 18% and a wet unit weight of 118.5 lb/cu. ft. The specific gravity of solids is found to be 2.72. Find the:
Determine the number of man-hours required to form the structure using data from R. S. Means or other appropriate reference. What is the difference between labor cost and labor pro-ductivity?
In an attempt to estimate the speed of a vehicle just before it hit a traffic signal pole, a traffic engineer measured the length of the skid marks made by the vehicle and performed trial runs at the site to obtain estimate if the coefficient of f..
what was involved in the first far-reaching, comprehensive study of Earth's oceans?
The average slope distance of 500m was measured with utilizing infrared light with wavelength = .91 um has a modulating frequency at 24.5 MHz. At the time of the measurement, the temperature was 27 degrees C and the atmospheric pressure was 755.1 ..
How appropriate might a just in time inventory system be for a product such as roller skates?
Beam Deflection Solution, Derive an expression for the deflection due to shear for a cantilever beam of constant rectangular cross section, under action of a point load, P at free end.
how many cubic feet of seawater, density 60 lb/ft^3, must be processed to recover 1 ton of magnesium, 1,272 ppm?
A coal-fired power plant produces a net electrical output of 500 MW. The composition of the coal burned is C= 72 %, H= 6 %, S= 3.5 %, O= 6 %, N= 1 %, and ash= 12 % by weight. It's heating value (HV) is 30200 kJ/kg. The net thermal efficiency is 36..
The factory will use a 4 ft deep on-site lagoon to stabilize the waste with a loading rate of 20 lb BOD/acre-day. Part a) What is the total BOD loading per day?
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