When a windmill turns to generate electricity, the amount of kinetic energy input in the process
A) equals the amount of electrical energy produced.
B) is less than the amount of electrical energy produced.
C) is more than the amount of electrical energy produced.
D) is unrelated to the amount of electrical energy produced.
C
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Osteoporosis is associated with which of the following?
A) an improper Na+/K+ balance B) increased calcium buildup in the bones C) loss of calcium from the bones D) none of the above
What is the greatest danger from earthflow?
A) loss of water quality by mud flowing into river drainages, polluting the water B) loss of life by rapid downslope movement of the earthflow C) deforestation along the earthflow path D) loss of property along the path of the earthflow
Matching
5. On the figure of the hydrological cycle, choose the letter that represents precipitation. 6. On the figure of the hydrological cycle, choose the letter that represents runoff. 7. On the figure of the hydrological cycle, choose the letter that represents evaporation. 8. On the figure of the hydrological cycle, choose the letter that represents infiltration. 9. On the figure of the hydrological cycle, choose the letter that represents transpiration.
If the amount of energy lost by the earth to space each year were not approximately equal to that
received, a. the atmosphere's average temperature would change. b. the length of the year would change. c. the sun's output would change. d. the mass of the atmosphere would change