I get that hot air is less dense, because the molecules are moving faster. But given random Brownian motion of the molecules, why do they move up? What causes the molecules with higher kinetic energy to sort themselves to the top of an air column?
In: Physics
Imagine when you are cold, you are cowering into a ball. Cold air does the same, so it sinks to the ground, actually pushing warmer air up.
Or like when you fall into a ball pit, you’re the cold air and all the balls, loosely spread, are warm air rising, while you sink throug them to the ground.
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