Environmental Protection Daily Quiz 12.19: Participate for prizes; 3 correct answers and another 3 prizes will be given
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This post was last edited by slll611 on 2015-12-22 at 14:33. Multiple-choice question: A heat pump can transfer energy from a colder object to a hotter object, while (B). A. No external work is required ； B. External work is required ； C. Determine whether work needs to be consumed based on the temperature difference between the hot and cold objects ； D. Obtaining electrical energy from the outside
A heat pump can transfer energy from a colder object to a hotter one, requiring work from an external source
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A heat pump can transfer energy from a colder object to a hotter one, while (B)