Chrobin
@Chrobin@discuss.tchncs.de
- Comment on I want a name for this 20 hours ago:
Scheiße*
- Comment on The most powerful brain on Twitter 2 weeks ago:
Is that a ReLife meme?!
- Comment on Hmmmm 5 weeks 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 5 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 5 months ago:
Yeah, quantum mechanics lingo: measurement = interaction
- Comment on Electrons 5 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? 5 months ago:
But they don’t use Bluetooth.
- Comment on Physics 6 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 6 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 7 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 7 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 7 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 7 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 7 months ago:
Gravity isn’t a force tho…
- Comment on Whoops 7 months ago:
For that, you need Hilbert spaces, linear operators on them, a little spectral theory, …
- Comment on Whoops 7 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" 7 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 7 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 7 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 8 months ago:
Obviously, the apartment with the Confederate flag has a swastika inside.
- Comment on STEM 8 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 8 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 11 months ago:
- 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.