Active solar energy systems involve
A. Large volumes of massive heat absorbers
B. Stationary materials to gather and hold heat
C. Photovoltaic cells
D. Pumps and moving fluids
E. Cogeneration
Answer: D
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Indicate whether the statement is true or false
Which of the following is true of red blood cells?
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If an imbalance occurs between incoming and outgoing energy at the earth's surface:
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