Chrobin

@Chrobin@discuss.tchncs.de

• ⁨Comment⁩ on ⁨Thoughts??⁩ ⁨⁨5⁩ ⁨weeks⁩ ago⁩:

  Also related, I had a psychology teacher with a PhD in psychology. But because in German schools, you need to teach two subjects (with the exception of the arts), he also taught physics. He was a terrible physics teacher, but a pretty good psychology one.

• ⁨Comment⁩ on ⁨UwU brat mathematician behavior⁩ ⁨⁨5⁩ ⁨weeks⁩ ago⁩:

  I do understand it differently, but I don’t think I misunderstood. I think what they meant is the physicist notation I’m (as a physicist) all too familiar with:

  ∫ f(x) dx = ∫ dx f(x)

  In this case, because f(x) is the operand and ∫ dx the operator, it’s still uniquely defined.

• ⁨Comment⁩ on ⁨Thoughts??⁩ ⁨⁨5⁩ ⁨weeks⁩ ago⁩:

  That reminds me of a story my bachelor’s supervisor in astrophysics told me: One of his best PhDs applied at an insurance company. They got an Excel sheet with data that they had 1 week to analyze. All the other applicants took the whole week. He just put it in Python, solved it in a few hours, and got the job.

• ⁨Comment⁩ on ⁨UwU brat mathematician behavior⁩ ⁨⁨5⁩ ⁨weeks⁩ ago⁩:

  I’d say the $\int dx$ is the operator and the integrand is the operand.

• ⁨Comment⁩ on ⁨UwU brat mathematician behavior⁩ ⁨⁨5⁩ ⁨weeks⁩ ago⁩:

  I think you mean operator. The operand is the target of an operator.

• ⁨Comment⁩ on ⁨But I am mighty!!⁩ ⁨⁨1⁩ ⁨month⁩ ago⁩:

  Actually,

  There’s no fire in the sun. Fire is some material oxidizing, and that’s not what’s happening (or at least not in relevant amounts). What creates the radiation is nuclear fusion.

• ⁨Comment⁩ on ⁨Anon turns on raytracing⁩ ⁨⁨1⁩ ⁨month⁩ ago⁩:

  Pokémon Ruby/Saphire/Emerald

• ⁨Comment⁩ on ⁨See something you like?⁩ ⁨⁨6⁩ ⁨months⁩ ago⁩:

  But don’t spread the bird flu pls.

• ⁨Comment⁩ on ⁨I want a name for this⁩ ⁨⁨8⁩ ⁨months⁩ ago⁩:

  Scheiße*

• ⁨Comment⁩ on ⁨The most powerful brain on Twitter⁩ ⁨⁨9⁩ ⁨months⁩ ago⁩:

  Is that a ReLife meme?!

• ⁨Comment⁩ on ⁨Hmmmm⁩ ⁨⁨10⁩ ⁨months⁩ ago⁩:

  The only field where it’s actually justified: math. In math, every time has an exact definition behind it, and you have to use the exact term.

• ⁨Comment⁩ on ⁨Falling⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  Just to add some formality to it, the original commenter might want to look up the shell theorem for classical mechanics and Birkhoff’s theorem for general relativity.

• ⁨Comment⁩ on ⁨Electrons⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  Yeah, quantum mechanics lingo: measurement = interaction

• ⁨Comment⁩ on ⁨Electrons⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  Actually a good point, tho. And also a good thought: If there is no special direction, what would be up? And that’s where quantum mechanics gets even weirder: It’s either up or down in the direction you measure.

• ⁨Comment⁩ on ⁨Why is there no sound?⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  But they don’t use Bluetooth.

• ⁨Comment⁩ on ⁨Physics⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  At least cosmology does use some serious quantum physics, even quantum field theory. Source: took 1 year of theoretical cosmology lectures.

• ⁨Comment⁩ on ⁨sweet dreams⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  They weren’t talking about radioactive decay, electrons are stable. They were talking about electrically charged particles emitting electromagnetic radiation when accelerated. (Circular movement is accelerated, see centripetal force) Since they use energy for this, they would very quickly fall into the nucleus (if I remember correctly, in around 10^-14s).

  Bodies with mass also emit gravitational waves when accelerated, but much less.

• ⁨Comment⁩ on ⁨we are but a gravy train in outer space⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  I’m not trying to argue approximations. Physics is just approximations all the way down. But as a physicist, I also love arguing about technicalities, and that’s also kinda the point of science communities for me.

• ⁨Comment⁩ on ⁨we are but a gravy train in outer space⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  But the point of general relativity is that a free-floating observer is equivalent to an observer in free space. That means that falling due to gravity, which you call a force, is an unaccelerated movement, i.e. no force.

• ⁨Comment⁩ on ⁨we are but a gravy train in outer space⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  In our current understanding of physics, it’s an effect from the curvature of space and not a force. Quantizing gravity results in unphysical divergences. Whether there will be a way to model gravity as an exchange of particles, we can’t know for sure. So according to our current knowledge, it’s not a force.

• ⁨Comment⁩ on ⁨we are but a gravy train in outer space⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  Well, firstly, we can quantize gravity pretty easily, it just has unphysical divergences.

  But secondly, I think it makes most sense to talk about the current accepted physics because we don’t know how quantum gravity will work.

• ⁨Comment⁩ on ⁨we are but a gravy train in outer space⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  Gravity isn’t a force tho…

• ⁨Comment⁩ on ⁨Whoops⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  For that, you need Hilbert spaces, linear operators on them, a little spectral theory, …

• ⁨Comment⁩ on ⁨Whoops⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  Many people are trying to give a definitive answer, and there are good theories, but honestly, it is still very much an open question. There are multiple interpretations and as people tend to do in popular science, some spread their opinion as a fact, but we don’t have one correct answer.

• ⁨Comment⁩ on ⁨Hasbro exec says Baldur's Gate 3 "proved for us that people really wanted great D&D games," supports Larian's plan to "take the time we need"⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  Everyone always says how great and optimized etc the game is, but for me, I had glitches every few minutes with crashes every few hours. Maybe the multiplayer is worse, but how I experienced the game, it was far from being ready to ship.

• ⁨Comment⁩ on ⁨shameless b8⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  The only thing I quickly found is this paper, which says that learning multiple things is not better nor worse than one thing at a time, but it also states in the abstract that cognitive psychologists believed up to that point that mixing multiple topics is beneficial.

• ⁨Comment⁩ on ⁨shameless b8⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  That is actually not backed by science. Mixing material is a lot more effective than focusing on one thing.

• ⁨Comment⁩ on ⁨"I wish you well in your future endeavors"⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  It’s afro American sociolect.

• ⁨Comment⁩ on ⁨1 already gone⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  Obviously, the apartment with the Confederate flag has a swastika inside.

• ⁨Comment⁩ on ⁨STEM⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  I think you just have to differentiate whether you want to do mathematically rigorous QM (which gets arbitrarily hard), or just do useful calculations.