Question: What are all the laws of physics that you know?

Sam Geen answered on 13 Nov 2020:

There are a bunch of different rules you can find for physics – I made up one the other day for a super specific way that nebulae around stars work, for example. But here are a few “big” rules we can think of that say very basic things about the universe:
– Conservation: what things can you never make or get rid of? Mass and energy is a big one, this is where e = mc^2 comes in – it says mass and energy can be exchanged.
– Gravity: how gravity works is pretty fundamental. Newton first came up with rules that worked well, but Einstein improved them with relativity to talk about how gravity bends space and how time works when you go really fast
– Quantum mechanics: these are not really “laws”, only ideas for how it works that seem to work in experiments.

Some laws can be found from other laws. For example, thermodynamics, or the study of how heat and temperature works, comes from Newton’s laws of motion of how lots and lots of atoms move together in a set of laws called “statistical mechanics”