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There are three reactors degrading a chemical biologically, at three degradation rates; i.e., 0.2 d^-1, 0.4 d^-1, and 1.0 d^-1. The residence time of the chemical in these reactors are 10 d, 5 d, and 55 d, respectively. Which reactor is more efficient and why? If all these are CMFR reactors, how can you increase the performance of the least efficient reactor?
the maximum degree of curvature can be at most 6.0 and the superelevation can be at most +6.0%. Design the ramp for the highest horizontal curve design speed given the constraints.
If the coefficient of static friction between the 50-lb roller and the ground is 0.25, determine the max force P that can be applied to the handle, so that the roller rolls on the ground without slipping.
Theis Method plot drawdown vs. time for 4 observation wells, 5, 50, 100, 500 meters from well pumping at constant rate of 300 m^3/day in sandy confined aquifer. b=12 m, K=25 m/day, and S=10^-4.
given the following cost expenditures for small warehouse answer project calculate the peak financial requirement, average overdraft.
A radioactive waste from a clinical laboratory contains 0.2 μCi (microcuries) of calcium-45 (45Ca) per liter. The half-life of 45Ca is 152 days.
An existing high-way railway at-grade crossing is being redesigned as a grade seperated to improve traffic operations. the railway must remain at the same elevation. the highway is being reconstructed to travel under the railway.
Given an 18-in. concrete conduit with a roughness coefficient of n = 0.013, s = 0.02, and a discharge capacit of 15 cfs, what diameter pipe is required to triple the capacity
The "supersoaker" water gun can shoot more than 30 ft in the horizontal direction. Estimate the minimum pressure, , needed in the chamber in order to accomplish this. List all assumptions and show all calculations.
Using method of joints, calculate the forces in members EC and EF. Note that the length of the member CD is 3.464 m, the length of member EC is 2m, and angle CDE is 30 degree ( this will cut down a bit of trigonometry effort).
Weather records for a certain region indicate that there is a tendency for two hot summers to occur in a row. From the statistics for the region, the following information has been es tahlished
Devise an absolute temperature scale where the boiling point of water at 1 atmosphere (101 kPa) pressure = 100 degrees in your scale. What is the ice point of water in your scale
A river upstream of a brdige corssing is 3 meters deep and has an average velocity of 3 m/s. The bridge piers cause a constriction in the width of the flow by 12%.
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