Chrobin

@Chrobin@discuss.tchncs.de

• ⁨Comment⁩ on ⁨I want a name for this⁩ ⁨⁨4⁩ ⁨weeks⁩ ago⁩:

  Scheiße*

• ⁨Comment⁩ on ⁨The most powerful brain on Twitter⁩ ⁨⁨1⁩ ⁨month⁩ ago⁩:

  Is that a ReLife meme?!

• ⁨Comment⁩ on ⁨Hmmmm⁩ ⁨⁨2⁩ ⁨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 ⁨⁨6⁩ ⁨months⁩ 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 ⁨⁨6⁩ ⁨months⁩ ago⁩:

  Yeah, quantum mechanics lingo: measurement = interaction

• ⁨Comment⁩ on ⁨Electrons⁩ ⁨⁨6⁩ ⁨months⁩ 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?⁩ ⁨⁨6⁩ ⁨months⁩ ago⁩:

  But they don’t use Bluetooth.

• ⁨Comment⁩ on ⁨Physics⁩ ⁨⁨7⁩ ⁨months⁩ 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 ⁨⁨7⁩ ⁨months⁩ 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 ⁨⁨8⁩ ⁨months⁩ 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 ⁨⁨8⁩ ⁨months⁩ 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 ⁨⁨8⁩ ⁨months⁩ 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 ⁨⁨8⁩ ⁨months⁩ 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 ⁨⁨8⁩ ⁨months⁩ ago⁩:

  Gravity isn’t a force tho…

• ⁨Comment⁩ on ⁨Whoops⁩ ⁨⁨8⁩ ⁨months⁩ ago⁩:

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

• ⁨Comment⁩ on ⁨Whoops⁩ ⁨⁨8⁩ ⁨months⁩ 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"⁩ ⁨⁨8⁩ ⁨months⁩ 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 ⁨⁨8⁩ ⁨months⁩ 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 ⁨⁨8⁩ ⁨months⁩ 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"⁩ ⁨⁨8⁩ ⁨months⁩ ago⁩:

  It’s afro American sociolect.

• ⁨Comment⁩ on ⁨1 already gone⁩ ⁨⁨9⁩ ⁨months⁩ ago⁩:

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

• ⁨Comment⁩ on ⁨STEM⁩ ⁨⁨9⁩ ⁨months⁩ 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.

• ⁨Comment⁩ on ⁨STEM⁩ ⁨⁨9⁩ ⁨months⁩ ago⁩:

  Well, when you get to Lie groups, it gets a lot harder. But generally I agree, nonrelativistic quantum mechanics is mathematically not that hard.

• ⁨Comment⁩ on ⁨Does anyone else feel like 90% of the population is stupid?⁩ ⁨⁨11⁩ ⁨months⁩ ago⁩:

  More precisely: If you repeatedly draw values from a probability distribution and sum them up, the sum tends towards a Gaussian (central limit theorem).

• ⁨Comment⁩ on ⁨poggers⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  The meme was talking about a legend about Gauß.

• ⁨Comment⁩ on ⁨BMW⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  I know that. But we still need to support the companies that do shit we want, so it’s more profitable to do so.

• ⁨Comment⁩ on ⁨BMW⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  I recently was in the BMW museum and they actually had a whole section dedicated to their Nazi past and how they want to never do that again. Do with that what you will but at least they’re not shoving it under the carpet.