Answer: Hot air is less dense than cool air; the heated air causes the balloon to rise simply because it is lighter than an equal volume of cold air. Buoyancy is an upward force that the air exerts, and it helps hot-air balloons and blimps stay in the air. A hot air balloon uses a burner to heat up the air inside the balloon.
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Answer:
The weight of the balloon is less than the weight of the air displaced by the balloon.
Explanation:
Like convection the hot hair rises and the cold air sinks, this is because hot air is more denser than cool air.
- Gradpoint 2021
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