If you examine the changes in day-by-day electrical demand in the United States, the pronounced daily drop in electrical consumption is most closely associated with
A) people going to work.
B) people sleeping.
C) home heating and cooling systems.
D) daytime activities that consume little energy.
Question 2
The large tapering cylindrical vapor-emitting structures associated with power plants are
A) smokestacks from a coal-fired power plant.
B) special wind turbines that capture swirling wind to produce electricity.
C) towers used to cool water heated by a coal-fired power plant.
D) combustion chambers used to burn natural gas to generate electricity.
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