AP Environmental Sciencehardmcq1 pt
A heat pump is efficient because it
A.moves existing heat rather than generating it
B.burns natural gas cleanly
C.generates heat from nothing
D.captures geothermal steam
Explanation
Core Concept
Pumping heat from outside air or ground can deliver several units of heat per unit of electricity — efficiencies above 100% versus burning fuel.
Correct Answer
Amoves existing heat rather than generating it
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