why is warm air lighter than the cold air?
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Answer:
Simple answer: Density. Molecules of hotter air vibrate more than cooler air, this vibration makes the airexpand, occupying a larger space for the same air, what makes it less dense. ... Why is hot water or hot air lighter than cold water or cold airis?
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Answer:Hot air rises because when you heat air (or any other gas for that matter), it expands. When the air expands, it becomes less dense than the air around it. The less dense hot air then floats in the more dense cold air much like wood floats on water because wood is less dense than water.
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