I'm actually a physics teacher ๐ In fact, as I write in the post, these questions are more about self-reflection. They bring to light some interesting points or issues about Newtonian mechanics and the way we teach it.
Please see my replies in the cross-post https://lemmy.ca/post/33867210
Completely agree, which I think is very interesting. In Newtonian mechanics, some scalar and vector quantities such as mass, internal energy, contact forces (stress), heat flux are frame-indifferent. Others, such as velocity and acceleration, are frame-dependent but we do have transformation rules for them. Some quantities โ and quite important ones โ such as momentum, are in a sort of limbo: they are frame-dependent, but there's no clear transformation rule for them.
From the point of view of relativity theory, it's interesting to note that for this particular case of coordinate transformation โ note that it is not a Lorentz boost โ we can actually calculate the spatial components of momentum in the new coordinate system, if the reported momentum is expressed as a covariant vector (p_ยต). This is because its unknown temporal component (energy) gets multiplied by zero in this transformation. But the text is ambiguous on whether the reported components are covariant or contravariant.
Regarding the third body, consider the case where its mass is, say, 2โฏkg, and the case where it's 1โฏkg instead (the momentum being the same).
Yes we're considering Newtonian mechanics in any case. What I'm especially curious about is what physical principles people use to motivate their answers.
With one of those spectacular yet "no big deal" moments we were waiting for... ๐คฃ
"Science of the Total Environment" journal? ๐คฃ๐คฃ๐คฃ๐คฃ๐คฃ Too silly even for a 3rd-rate sci-fi film...
Cheers! Looks like a great fediverse platform. So sad that the choice of English-speaking servers seems somewhat limited - for now.
What's Misskey? Never heard of! Time to check.
these autonomous agents represent the next step in the evolution of large language models (LLMs), seamlessly integrating into business processes to handle functions such as responding to customer inquiries, identifying sales leads, and managing inventory.
I really want to see what happens. It seems to me these "agents" are still useless in handling tasks like customer inquiries. Hopefully customers will get tired and switch to companies that employ competent humans instead...
This is completely random, but... has a Gaussian distribution ever been made? It'd be absolutely hilarious :D
Sorry for the spam โ mods feel free to erase!
cross-posted from: https://lemmy.ca/post/2011048
For years I've been using DejaVu fonts, but in the last years I had the feeling that this project had been abandoned. And indeed it has.
Does anyone know of good open-source alternatives?
I've heard of GNU Unifont, which seems still alive, but it isn't the kind of font one would use for, say, slides or websites.
Liberation and Kurinto were interesting (though not au par with DejaVu, in my opinion), but seem to have been abandoned as well.
I'm tired of Google and personally am not interested in fonts commissioned by them.
You can find it at /c/typography@lemmy.ca or !typography@lemmy.ca.
I was looking for such a kind of community to post a question, but a search in https://browse.feddit.de/ showed that no such community seems to exist as yet in the Fediverse. So why not creating one.
I'm often seeing links to posts on Mastodon and, when I click on them, they open in a Mastodon instance different from mine (I mean from the one where I have my account). This means that I cannot reply, boost, etc, that post.
The very roundaboundaboundabout way to solve this is to go to your instance and search/"explore" for that post.
Is there a smoother way to address this problem?
I found 1001 "beginner's guides for Mastodon" online and after reading 3 without finding any solution, I decided to ask here.
A similar problem existed with communities (and still exists with posts) in different Lemmy instances, but luckily tools like the Lemmy Instance Assistant solve this rather smoothly with a click.
PS: sorry if this sounds like a rant โ it isn't. Just asking for info. I'm sure problems like this will eventually be solved in the Fediverse :)
"Ethical and legal objections". The point in this case is that what's legal is unethical, and what's ethical is illegal. Analogous to other situations through history and countries, for example in the USA when it was illegal for black people to sit in certain parts of a bus, or in Germany when marriage with Jewish people was illegal.
As human beings, it's always important to make the ethical choice.