For Problem 5.18, calculate the savings in cubic feet of natural gas. Assume the furnace has an efficiency of 98%.
What will be an ideal response?
Assuming natural gas has a heating value of 1,000 Btu per cubic foot and the furnace has
an efficiency of 98%, the amount of fuel oil required to keep the home at 68°F is given
by
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When winds blow across the sea surface, they transfer their energy to the water by generating ________
A) heat B) currents C) tides D) waves E) wind
Hadley cells at the equator consist of
A) rising, moist air that produces precipitation and rain forests, and falling, dry air associated with deserts. B) rising, dry air associated with deserts and falling, moist air that produces precipitation and rain forests. C) warm, moist air rising up the sides of mountains and cool, dry air descending on the leeward sides. D) cool, dry air rising up the sides of mountains and warm, moist air descending on the leeward sides.
Demographers predict that global population will continue to increase. As population increases, which of the following statements represents future agricultural changes for maintaining an adequate food supply?
What will be an ideal response?
Which of the following statements about U.S. landfills is true?
A. It is against the law to build anything on an abandoned landfill. B. Landfills should be kept as dry as possible to maintain high biodegradation levels. C. More than three-fourths of the landfills in the United States have been closed since 1988. D. There are more active landfills in existence today than ever before.