Always upvote Feynman. Got me through some tough times in undergrad.
Claidheamh
joined 2 years ago
There's a surface level misunderstanding of the concepts going on.
Once again, let me try to clarify what I think you're not getting. Quantum mechanics is exactly that, mechanics of particles. Just like Newtonian mechanics, but for quantum particles instead of macroscopic. The same way in classical physics you use Newton's laws to describe the motion of charged (or any, really) particles, in modern physics you use quantum mechanics. It doesn't "replace" electromagnetism, they're separate things. A bad metaphor, but it's a little like saying cardiology replaces anatomy.
Yes, electromagnetism is fundamental. No, you can't derive it from quantum mechanics — you'd use quantum field theory for that (specifically quantum electrodynamics).
Coulomb's law and Maxwell's equations are classical physics, but not mechanics. They don't describe the motion of particles, they describe forces and fields. And you use them all the time in quantum mechanics. Pick up any intro to quantum physics textbook, and you'll see them everywhere.
All that to say again that this meme is comparing Newton's law of gravitation with Coulomb's law... So why keep insisting on bringing quantum mechanics into this? It really doesn't figure into the meme at all.
Quantum mechanics didn't supersede electromagnetism. Again, they're different things. Electromagnetism is a fundamental interaction. Whereas quantum mechanics describes the mechanics of quantum particles. Whether those particles are affected by electromagnetic forces or not. It's a description of how they behave at quantum scales.
Coulomb's law has nothing to do with quantum mechanics, it's a description of how macroscopic charged particles interact. What the OP should have said to be correct is:
Awesome to see the similarities between: Newton's law of gravitation and Coulomb's law
I don't know where he got quantum mechanics from.
They're different things. The OP means electromagnetism, Coulomb's law has nothing to do with quantum mechanics, it's classical physics.
The relation between them is that they're both forces that scale with the inverse square of the distance between the objects. Any force that scales with the inverse square of distance has pretty much the same general form.
Another similarity is that both are incomplete, first approximations that describe their respective forces. The more complete versions are Maxwell's laws for electromagnetism and General Relativity for gravity.
It's electromagnetism you mean, not quantum mechanics.
The Earth will always be here. We, on the other hand...
It depends on those factors and a few others. You can also pay extra to ensure your electricity comes from all renewable sources. The so-called "Garantias de Origem" (guarantee of origin).
Here's the energy mix for a regular domestic consumer in the month of October.
It's not so rosy as these kinds of news want you to believe. Greenhouse gas emissions are still embarassingly high.
Flehmen's response. It's the organ that's called Jacobson's organ.
There are 10 people in space right now. 8 billion down here.
That's a bit of a stretch, he may be Socialist Party, but most of the policies of his government have been practically neoliberal.