[-] Sasha@lemmy.blahaj.zone 3 points 6 hours ago

No idea if I can reply to a deleted comment but I read the root comment totally wrong and just restated everything they said. My bad.

[-] Sasha@lemmy.blahaj.zone 2 points 7 hours ago

If that was the case, we would already have a quantum theory of gravity. The fact that "gravitons" (here I mean the particles of a second quantisation of GR) can interact with themselves makes the theory almost completely useless.

It's technically possible to write down such a theory, but the only way to get results out of it is to first perform an infinite number of experiments.

[-] Sasha@lemmy.blahaj.zone 7 points 7 hours ago

Almost none of this applies in the case of something like loop quantum gravity, which I understand very little of but I don't believe it's possible to discuss it using the language of QFT like I have above.

[-] Sasha@lemmy.blahaj.zone 19 points 7 hours ago* (last edited 6 hours ago)

I briefly worked in this area of physics, it's complicated and depends on your definition of a particle and which quantum gravity model you're talking about.

To simplify things you can just ask the same thing about non-quantum gravity. Why does gravity escape the black hole? The painfully mundane answer is that the black hole is gravity, it's not escaping itself. Gravitational waves can't be emitted from inside the black hole but that's because those are a form of radiation and not the structure of spacetime.

This is specifically important because even quantum gravity (the kind with gravitons) still has this distinction. Particles belong to a field and are excitations of it, the gravitational field itself is not made of those particles. The force associated with that field is mediated by gravitons, but what that really means is complicated and honestly possibly just the result of a cool mathematical trick. It also comes with a bunch of crazy behaviour where you have particles that can break the laws of physics by just kinda doing it so quickly that nature blinks and misses it.

The point is, the quantum gravitational field is enough for the black hole to do its job when objects come by, gravitons don't actually need to escape, though they are involved in complicated ways.

[-] Sasha@lemmy.blahaj.zone 3 points 1 day ago

Ah right fair enough, I'm just talking about the situation in Australia

[-] Sasha@lemmy.blahaj.zone 18 points 1 day ago

The safety isn't about lane filtering so much as just intersections, but yeah it's a rubbish argument and any biker making it should shut the fuck up if they don't wear hi-vis on every ride

[-] Sasha@lemmy.blahaj.zone 47 points 1 day ago

This is honestly an entirely valid complaint. There are way too many motorcyclists who replace their mufflers with aftermarket ones that are illegally loud, in some cases loud enough to cause hearing damage to pedestrians.

[-] Sasha@lemmy.blahaj.zone 4 points 2 days ago

Hard agree, unsubscribed from real engineering the moment I realised they made ads without ever declaring it. It's literally just propaganda at this point

[-] Sasha@lemmy.blahaj.zone 4 points 5 days ago

I think I finally met the love of my life, I don't think I'd want to risk changing anything

[-] Sasha@lemmy.blahaj.zone 4 points 6 days ago

If you're looking for books, then it depends on what field you want to study. Generally just I'd search for recommended textbooks for that field and then I'd definitely buy it and wouldn't just download it from libgen.is

55
Eupho Rule (lemmy.blahaj.zone)

I was in an antique store and I found the anime section

111
Mandorule (lemmy.blahaj.zone)

Bought a mandolin today and I can't put it down, I can't wait to write tons of pretty songs :3

44
Lyrics Rule (lemmy.blahaj.zone)

Big Thief - Mary

[-] Sasha@lemmy.blahaj.zone 223 points 7 months ago* (last edited 7 months ago)

Power move

I'd totally do this on purpose

182
Invasion Day Rule (lemmy.blahaj.zone)
submitted 7 months ago* (last edited 7 months ago) by Sasha@lemmy.blahaj.zone to c/196@lemmy.blahaj.zone

From the Narrm invasion day rally, we had an enormous turnout

102
Adrianne Lenker Rule (lemmy.blahaj.zone)

Go listen to Big Thief!

125
Too many pickles rule (lemmy.blahaj.zone)
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Sasha

joined 9 months ago