this post was submitted on 03 Jul 2024
757 points (98.0% liked)

Science Memes

10923 readers
2317 users here now

Welcome to c/science_memes @ Mander.xyz!

A place for majestic STEMLORD peacocking, as well as memes about the realities of working in a lab.



Rules

  1. Don't throw mud. Behave like an intellectual and remember the human.
  2. Keep it rooted (on topic).
  3. No spam.
  4. Infographics welcome, get schooled.

This is a science community. We use the Dawkins definition of meme.



Research Committee

Other Mander Communities

Science and Research

Biology and Life Sciences

Physical Sciences

Humanities and Social Sciences

Practical and Applied Sciences

Memes

Miscellaneous

founded 2 years ago
MODERATORS
 
top 46 comments
sorted by: hot top controversial new old
[–] [email protected] 65 points 4 months ago (3 children)

A schwarschild radius of 0.5 meters corresponds to about 56 Earth masses. So Richard must have accreted a bunch of mass before he collapsed.

[–] [email protected] 12 points 4 months ago

Or maybe he accreted the mass after collapsing?

Alternatively, maybe that's just the weight of his massive ego?

[–] [email protected] 10 points 4 months ago (2 children)

Your mom is so fat, were she to collapse into a black hole her schwarzchild radius would be 0.5 meters. Does not quite roll of the tongue, does it?

[–] [email protected] 10 points 4 months ago

I’ll bet Eminem could find a way

[–] [email protected] 1 points 4 months ago

Your mom's schwarzchild radius is nearly as big as she is!

[–] [email protected] 6 points 4 months ago (1 children)

Since you know the math, how long before it evaporated? Also, at what distance would an object feel 1G of acceleration?

[–] [email protected] 1 points 4 months ago* (last edited 4 months ago) (1 children)

Not OP. What would evaporate?

I think we don't know anymore what's going on with Richard. I believe he would consume Earth almost instantly, including all satellites and maybe the moon.

Didn't do the math myself, but internet says 1 G would be at about 48 km radius.

[–] [email protected] 6 points 4 months ago (1 children)

For an object heavier than the Earth, 1g radius will be greater than the radius of Earth. For 56 Earth masses that's sqrt(56) times bigger = 48000km.

A 56 Earth mass black hole will take 5.5e55 years to evaporate according to this calculator. A 100kg black hole (more close to what Richard used to be) is much smaller than the nucleus of an atom and will evaporate in 0.05 nanoseconds.

Curiously there was a paper recently that calculated that even if there was a small black hole in the center of the Sun, it would take millions of years for it to grow, because the aperture is so small not much can fit through, and the infalling gas heats up so much as to repel the rest, creating an internal hot bubble.

[–] [email protected] 1 points 4 months ago (1 children)

I am fairly sure Earth's radius is somewhat 6 km, so something with an 48 km radius would be 42 km above Earth's surface, where we experience 1 G.

Can you explain please, where I made a mistake?

[–] [email protected] 2 points 4 months ago (1 children)

Can you explain please, where I made a mistake?

Your mistake is thinking Earth is 6km in radius! :D 6km is how far you walk in an hour. Either you think Earth 1000 times too small or kilometer 1000 times too big.

[–] [email protected] 3 points 4 months ago

😁 whooopsie! Haha. Yeah, it's somewhat 6000 km I mean. Sorry for my stupidity here today... Thank you very much for explaining my dumb mistake instead of making fun! Time to sleep now, I guess. Thank you!

[–] [email protected] 43 points 4 months ago (5 children)

the cat is struggling to not fall in but tbethe people are unaffected, implying that either:

  1. Richard is capable of controlling their gravitational pull, and just hates cats
  2. The people have learned to resist gravity.
[–] [email protected] 14 points 4 months ago (1 children)

I think Richard is allergic to cats. Everyone knows that cats are attracted to people who are allergic to them

[–] [email protected] 3 points 4 months ago

The selective attraction exerted on the cat by the Richard black hole reveals that Richard is allergic to cats, as cats are attracted to people allergic to them [1].

[1] - ThisIsAManWhoKnowsHowToGling et al., lemmy.dbzer0.com (2024)

[–] [email protected] 13 points 4 months ago* (last edited 4 months ago)

I vote for option 1, since fluids are also unaffected by his gravity

Also a slight correction, maybe Richard LOVE cats

[–] [email protected] 3 points 4 months ago
  1. The cat had the zoomies, was running toward Richard, got spooked, turned to run away digging their carpet destroying knife hands into the carpet, and this is the still shot of them primed to reach escape velocity going away from Richard
[–] [email protected] 1 points 4 months ago (1 children)

Or ... Their greater mass renders them less affected than the tiny cat.

[–] [email protected] 3 points 4 months ago

That's not how gravity works. It's proportional to your own mass.

[–] [email protected] 30 points 4 months ago (1 children)

Richard must’ve been very dense. Now that you can measure from the event horizon, he could be surprisingly likable.

[–] [email protected] 11 points 4 months ago (1 children)

Well it takes a long, long time to reach him out. It feels like time is slowing down

[–] [email protected] 12 points 4 months ago* (last edited 4 months ago)

He’s now the kind of really simple man
you can describe in just three terms:

Mass, charge, and angular momentum.

[–] [email protected] 12 points 4 months ago

The cat is a nice detail.

[–] [email protected] 11 points 4 months ago (1 children)

Richard evaporated, almost instantaneously.

[–] [email protected] 1 points 4 months ago

Into gamma rays

[–] [email protected] 6 points 4 months ago (4 children)

Black holes aren't like magnets

[–] [email protected] 3 points 4 months ago (1 children)

Right. Magnets only work on ferrous metals. Black holes will suck anything in, even light.

[–] [email protected] 4 points 4 months ago (1 children)

Saying they suck things in isn't really correct, unless you want to also say that the sun is constantly sucking Earth toward it. It's just gravity.

Also, magnets don't only work on ferrous metals. Magnets push electrons through copper loops in generators and that's how we have electricity.

[–] [email protected] 3 points 4 months ago

More accurately things fall into black holes, but we're just talking about a comic.

[–] [email protected] 3 points 4 months ago

Boy are you wrong

[–] [email protected] 2 points 4 months ago (1 children)

What about the comic made you think it was implying that?

[–] [email protected] 13 points 4 months ago

I think they're implying that a black hole the mass of a person has the same gravitational attraction that the person had before collapsing (negligible).

[–] [email protected] 0 points 4 months ago

Neither is gravity. What's your fucking point?

[–] [email protected] 2 points 4 months ago

Here is the novelization of the cartoon... sort of. As She Climbed Across the Table by Jonathan Lethem.

[–] [email protected] 2 points 4 months ago (1 children)

Not a physicist, but how long would a blackhole of that size last lol?

[–] [email protected] 6 points 4 months ago* (last edited 4 months ago)

Hard to be completely sure.. but an earth mass black hole is roughly an inch across.

That's probably a Jupiter mass black hole.. things would be a lot more wild at that party.

Honestly this is an event horizon.. not the black hole itself and I'm too fucking lazy to do the schwazchild calculations maybe it matters at this scale.. maybe not.

[–] [email protected] 1 points 4 months ago (2 children)

What's the opposite of a black hole?
That's me 👉😏👉

[–] [email protected] 7 points 4 months ago (1 children)
[–] [email protected] 1 points 4 months ago (1 children)

no because white holes still attract matter

[–] [email protected] 1 points 4 months ago (1 children)
[–] [email protected] 1 points 4 months ago (1 children)
[–] [email protected] 2 points 4 months ago (1 children)

white hole is a hypothetical region of spacetime and singularity that cannot be entered from the outside, although energy-matter, light and information can escape from it. In this sense, it is the reverse of a black hole, from which energy-matter, light and information cannot escape. White holes appear in the theory of eternal black holes.

Wat?

[–] [email protected] 1 points 4 months ago (1 children)

Literally in the first sentence of the overview.
"They attract matter like any other mass"

[–] [email protected] 2 points 4 months ago

Oh i checked the intro and then the properties lol

[–] [email protected] 1 points 4 months ago (1 children)

A white hole, emitting mass and energy. You vomit a lot?

[–] [email protected] 1 points 3 months ago

No but i do spew a bunch of bullshit all the time. lol