In physics one of the most interesting things is the Correspondence Principle: at large scale everything averages out.
It's an intractable nightmare trying to calculate what a single big atom is up to. Get 10^23 of them together and basic algebra works good enough to describe what it's doing.
It's an intractable nightmare trying to calculate what a single big atom is up to. Get 10^23 of them together and basic algebra works good enough to describe what it's doing.
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Being able to look at a literally intractable system of 10^23 things and go "I can still think about this" basically.
As thing gets bigger you go from an *impossible* nightmare of calculations to, like, the ideal gas law a high schooler can understand and use.
The absolute nightmare, impossible math of figuring out what 10^23 xenon atoms are up to, and yet you can still think about them with pV = nRT.
And then later, go "and here's what's going on inside this part"
"What are these 10^23 things doing?" Is a question that has a simple answer a kid can do. That's cool