Why do warm gases/liquids rise and cool gases/liquids fall?

Md Ariful Islam

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Md Ariful Islam

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And is also the reason why solids and liquids that are less dense than water, FLOAT on water.......

$"Archimedes' Principle states that......"$

$"...a body immersed in a fluid experiences a buoyant force equal"$ $"to the weight of the fluid it displaces........."$

A gas or a liquid (a fluid in fact) that is WARM necessarily occupies more volume than a colder fluid. This is especially true for gases, where volume is a state function of temperature......$VpropT$.

And this is also the basis of the hot-air balloon, where the hot gas inside the balloon displaces a mass of air that is greater than the mass of balloon and the basket, and so the balloon floats.

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