Question

hot air rises up... pls demonstrate this activity​

Answer 1

Answer:

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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

Answer 2

Answer:

when you heat air at more than room temp it expand because in heating particle of oxygen colliding and vibrating.therefore we can say that on heatig it expand