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Does hot air move into cold air or does cold air move into hot air?

Kristi Hammond

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Kristi Hammond on January 22, 2019

Both. Given that hot air is less dense than cold air, the warm air rises as cold air falls (i.e. as the cold air displaces the hot air). If you were to dye hot air and then inject in the middle of a room, you would have to observe the dyeing of rising warm air. What you may not know is that gravity pulls the (invisible) surrounding dense than the cold air down as it displaces the (visible) less dense, dyed hot air. === Previous Posters Answer: Hot air rises


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