Maximum gravitational force for a satellite in elliptical orbit occurs at the
A. zenith.
B. perigee (closest point).
C. apogee (farthest point).
D. same acceleration at all of the above locations
Answer: B
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______________ includes various processes by which rocks at or near Earth's surface are disintegrated or decomposed in preparation for their removal and transportation
Fill in the blank(s) with correct word
Zero population growth occurs in a population when ________
A) total fertility rate exceeds the average replacement rate B) birth rate equals death rate, and there is no migration C) the ecological footprints are larger than the carrying capacity D) the carrying capacity is larger than the ecological footprint E) people have as many children as they can in the first five years of marriage
Despite its high resource usage, beef is a major commodity due to the high value per kilogram of the final product. Which of the following changes would cause a reduction in beef production?
a. an agricultural program that subsidized pork production so that the profit per kilogram of pork was comparable to that for beef b. a precipitous fall in the price per kilogram of beef c. a dramatic rise in the cost of feed, land, and water to the beef producer d. all of the above e. none of the above
The hair hygrometer:
A) uses hairs from dogs, usually golden retrievers. B) takes advantage of the ability of hair to respond to changes in humidity. C) was popular in the nineteenth century, but is no longer used today. D) requires swinging the instrument around one's head for at least a minute.