I live in a bigger US city that does have a metro. It’s not bad for doing longer trips in certain directions, when it’s working. But it breaks down at least a few times a year, and if you have to make a transfer to another train to make it to your destination, it’s often literally faster to walk.

Considering each chair is built for that specific member, I think you have to take each chair owner’s anatomy into account.

Coffee

I spent a few $1000 on the computer, I’ll spend $100 more to make it look fancy

Private servers are not always a viable alternative option for players as the protections we put in place to secure players’ data, remove illegal content, and combat unsafe community content would not exist and would leave rights holders liable.

Then it sounds like the legislation enforcing leaving private servers on the table should also move the liability to whoever is hosting the servers. I’d be surprised if it doesn’t work that way already tbh.

But can electromagnetism at all emerge if the quantum mechanics dont exist to emerge things like magnetism and some of the behavior of electrons?

Short answer: yes.

Technically the world can’t exist without all of its physics. But that’s kinda backwards from how you study it. Quantum mechanics isn’t “more correct” than classical mechanics, it’s more that it’s “more detailed”.

If you want to model an electromagnet, an electronic circuit, light (in most macroscopic situations), how permanent magnets interact, electrostatic situations like how static electricity makes your hair stand up, lightning, the magnetic fields of celestial bodies like the Earth and Sun (they are big electromagnets), etc. you will use “classical” electromagnetism (meaning Newton’s mechanics, possibly with Einstein’s modifications, and Maxwell’s equations).

If you want to model material science situations, like determining what material to make a diode or transistor out of, or if a given material can become a permanent magnet, you will likely need quantum mechanics to help model the interactions of electrons on the atomic scale. The section on Wikipedia you were looking at is about this kind of material science. You do this by combining the same “classical electromagnetic” equations with Schrödinger’s equations for quantum mechanics.

diamagnetism, paramagnetism and ferromagnetism can be fully explained only using quantum theory

The magnetic properties of certain materials (e.g. why an unmagnetized piece of iron sticks to a magnet of either polarization), the way permanent magnets work, is best explained by quantum mechanics.

However, the electromagnetic force itself doesn’t “arise” from quantum mechanics, and you can explain things like electromagnets and a lot of common electric circuits (until you need a transistor) quite well without considering quantum mechanics.

Usually you take the “classical” formula for a force and to inform your quantum mechanical model of particles, and that’s how you can arrive at things like deriving how permanent magnets work with the help of w quantum mechanics.

Generally, a lot of material science and chemistry is inherently quantum mechanical because the way atomic orbitals and molecular bonds work is heavily quantum mechanical.

Fundamental means it cannot be explained by being caused by something else.

Fundamental force means we expect a carrier particle to explain it (for gravity that’s the Graviton, although it hasn’t been detected yet).

electromagnetism is caused by quantum phenomena.

Not even remotely true.

What is the cause for spacetime or quantummechanics? Idk but somehow they don't make it on the list of fundamental forces.

Quantum mechanics is mostly that statistics is more complicated than we all thought . Seeking a cause for spacetime is interesting. It might be relevant to mention that there is a fundamental particle that imparts mass, which we call the Higgs Boson. I guess that could make mass and inertia something of a “fundamental force”.

This is the plot of Horizon Zero Dawn

Signal is an open-source privacy-focused end-to-end encrypted texting platform (so competing with SMS, WhatsApp, iMessage, Telegram, and similar). It’s developed by a donation-funded non-profit organization.

Signal is quite good compared to the competition, but it faces a lot of scrutiny because they make big promises about privacy and security so the people who care will really get into the details on that. Also IIRC there was a period when one of their competitors was trying to slander them more or less.

In general there’s nothing wrong with Signal and it’s quite a good option. If you really care about the privacy details you can always host your own instance (but that would require you to convince your friends to use your instance … it’s not federated).

You laugh but if you ever take a college physics class you’ll appreciate having the idea of being overly careful of your units drilled into you.

I wanna see a modern Zombie movie with how people would actually react to news of a zombie outbreak given how people behaved during the pandemic