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Refrigerator

Science brain teasers require understanding of the physical or biological world and the laws that govern it.

 

Puzzle ID:#15976
Fun:*** (2.37)
Difficulty:* (0.93)
Category:Science
Submitted By:curtiss82*****
Corrected By:cnmne

 

 

 



On a hot summer day, a man who had no air conditioning decided that he would cool off his home by leaving the door to his refrigerator open. Does he succeed in cooling off his home?



Answer

No. All a refrigerator does is take heat from inside the unit and pump it to the back. So doing an energy balance would lead to the conclusion that no cooling overall takes place. Further investigation would reveal that the home would actually heat up since refrigerators need an electric motor to operate. This would generate additional heat, making the home hotter.
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