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As more complete mixed reactors in series are provided, the system becomes more plug flow. For a substance that decays according to first-order kinetics, what is the equivalent PF rate constant that would be used to describe treatment in a series of three CM reactors in terms of flow (Q), the total volume in the system (V), and the rate constant observed for the CM system?
A 27ft beam has a uniform load of 6kip/ft. along its entire length. From left to right x=0ft to x=27ft. At x=0 ft it is pinned and at x=18 ft there is a roller. So, the 9 ft end section is cantilevered.
According to a settlement analysis, the weight of this fill will cause 600 mm of the total settlement over a period of 30 years. The differential settlement will probably be about 100mm. Although the building could be supported on spread footing f..
A disinfection process for potable water treatment is described by first order kinetics with a rate constant of 0.08 minute. An ideal plug flow reactor is used with a hydraulic residence time of 1 hour. What is the expected efficiency of the syste..
A storage room in an industry has a floor area of 30 m by 50 m and a height of 10 m. A garage door has a width of 3 m and a height of 3 m and the room has four windows that are 0.9 m by 0.9 m, situated at the height of 1 m from the floor.
At a certain location on the surface of an engineering component, the material is in a state of plane stress with principal stresses of fmax = 150 MPa and fmin = 50 MPa (both tensile). If the yield strength of the material is Y = 350 MPa
The rod has a uniform cross-section of 53mm2. The external load consists of point loads: two P1 of 3kN, two P2 of 1kN, and one P3 of 7kN. What is the normal stress at the fixed support
At a local engineering firm, a supervisor thinks about buying a new copy machine for $700 but only wants to keep it for 3 years. Using the DDB find the book value of the machine at the end of 2 years.
two cars, connected by a cable, are winched up an incline using a second cable. the incline makes an angle of 25 degrees with the horizontal, and the winch rises another 30 degrees above the incline.
At point D, Fred measured the distance to point E, the final point, to be 405.27 ft. The noon whistle sounded (you may have to have a little "small town" in you to appreciate the noon whistle), so they left in a hurry without measuring the angle C..
A rear-wheel-drive 3000lb drag race car has a 200-inch wheel base and a center of gravity 20 inches above the pavement and 140 inches behind the front axle. The owners wish to achieve an initial acceleration from rest of 15 ft/s on a level paved s..
The first stratum is confined, and the second one is unconfined, and the water surface elevations in the channels are 24 m and 16 m above the bottom of the unconfined aquifer.
An investor is considering buying a 20-year corporate bond. The bond has a face value of $1000 and pay 6% interest per year in two semiannual payments. To receive 8% interest, compounded semiannually, how much should be paid for the bond
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