2. A device that can be used both for cooling and heating is a _____. (1 point)
heat engine
compressor
heat pump
vaporizer
3. All objects emit _____ radiation. (1 point)
electromagnetic
kinetic
thermal
solar
4. Fast food restaurants keep food hot with infrared lamps. The heat is transferred to the food by _____. (1 point)
condensation
conduction
convection
radiation
3 answers
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I now the answer to number 1 and it is Heat pump.
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1 answer