Mr. Ivanichek used a 24-foot-wide disk to disk 340 acres of wheat. He was able to disk 10.8 acres per hour with a total cost of $78.50 per hour.
a. How many hours did it take to do the disking?
b. What did it cost to do the disking?
c. What was the cost per acre?
a. 31.5 hr
b. $2,472.75
c. $7.27/a
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Calculate the BOD of the sewerage stream
The Ganges River, shown in Figure 4.66, has an annual average flow rate of 12,105 m3/s. The average temperature of the Ganges River was reported to be 24.6ºC. The Ganges has become contaminated with raw sewerage and industrial waste so that the dissolved oxygen in the river upstream of sewerage discharges is 4.6 mg/L. Suppose that the raw sewerage that is untreated flows into the Ganges at a rate of 460 m3/s, the temperature is 25ºC, and the dissolved oxygen in the sewerage stream is completely depleted (i.e. DO = 0). How would you develop a plan for improving water quality in the Ganges River?
Suppose the following data was collected to estimated the five-day BOD in the river and sewerage water:
What will be an ideal response?
A ____ can be described as a solenoid with switching contacts attached to a movable plunger.
a. coil b. relay c. hydraulic circuit d. pneumatic circuit
Most diseases and ailments that affect humans can also afflict dogs and cats
A. True B. False
A driver notices that the "Low Traction" warning light flashes at times during heavy acceleration. What is the most likely cause?
A) Normal operation B) A defective vehicle speed (VS) sensor C) Fault with a wheel speed sensor D) A fault with the ABS controller