Anything can be described by mathematical models. Some things we have no other way of describing than maths, because we can’t touch them or see them. Like forces, or anything quantum.
There are equations modelling heat transfer, motion, mechanical stresses, etc.
That super realistic water in the new Avatar movie? It was made on a computer, with maths, because that’s the language computers speak. People found a way to model the behaviour of water with equations of motion and forces, then had a computer crunch them and show the results as visuals.
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