This knowledge may very well be pre-historic - however Thalos is quoted as having mentioned it. There are no direct works of Thalos preserved, he was the great grand-daddy of philosophy and lives on only in quotes of his successors.
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∙ 14y agohot air rises.
Hot air rises. As the air in the hot air balloon is made hotter than the surrounding air it rises.
hot air rises
Hot air rises
Hot air rises.
hot air rises.
Hot air rises and cools as it does so.
Hot air rises. As the air in the hot air balloon is made hotter than the surrounding air it rises.
hot air rises
Hot air rises
hot
hot air rises
Hot air rises.
The air density inside a balloon changes as it rises because the hot air inside the hot air balloon is less dense than the air around it causing it to fly since hot air rises. But as it rises it loses its hot air causing it to eventually not be able to fly anymore and come down.
hot air rises because it is less dense than cold air..this occurs by the process of convection
Hot air rises. That is how a hot air balloon works.
technically hot air does not really rise it is the cold air that sinks below it because it is more dense.