Follow the steps of the Systematic Approach of Section 14.4—that is, (1) identify the system, (2) determine whether the process is batch or rate, (3) construct a schematic diagram with inputs and outputs, (4) Label known material quantities or rates of flow and so on.
A slurry (mix of water and insoluble material) of crushed mine coal is fed to a cyclone separator at a rate of 8.0 t/h. The mine coal averages 78 percent pure coal and 22 percent pyrite. Pure coal is recovered at the top of the separator. The waste from the bottom of the separator contains 3.0 percent pure coal and 35 percent pyrite; the rest is water. How much pure coal can be obtained in a 12 h time period?
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Allelopathy is the production of a chemical compound by one plant that _____ another plant
A) ?lowers the quality of fruits produced by B) ?boosts the growing capacity of C) ?adds two years to the lifetime of D) ?slows or stops the growth of
In the accompanying diagram, a bond beam is shown which is used to strengthen the top of the wall, Identify the material used showing no.3.
A. pipes in cement B. rebars embedded in grout C. portland cement grout D. U-shaped lintel blocks
You are a well-paid engineer with a well-established international corporation. In planning for your retirement, you are optimistic and expect to make an investment of $10,000 in year 1 and increase this amount by 10% each year. How long will it take for your account to have a future worth of $2,000,000 at a rate of return of 7% per year?
What will be an ideal response?
Technician A says primary vibration is created by the slight differences in the inertia of the pistons between top dead center and bottom dead center. Technician B says secondary vibration is a strong low-frequency vibration caused by the movement of the piston traveling up and down in the cylinder. Which technician is correct?
A) Technician A B) Technician B C) Both technicians D) Neither technician