starman2112
@starman2112@sh.itjust.works
- Comment on Cheers Bro 1 week ago:
Because I am the turboest of nerds I have made this a spreadsheet as well. Can’t actually share it for privacy reasons, but it fits within a 4x5 set of cells if anyone wants to copy it. You don’t even need to know what the math is doing, just copy the functions into the cells verbatim and it should work like a charm. Just remember you’re using radii, not diameters
- Comment on Cheers Bro 1 week ago:
I use calipers and math to figure out how much filament is left on a spool.
For example, think of the filament as one solid ring of plastic. The spool is 60mm wide, the inner radius (of the filament, not the spool) is 28mm, and the outer radius is 40mm. Subtract the volume of the empty cylinder in the center from the solid cylinder of plastic, then multiply by 0.7 to account for packing density, and boom, you have a volume of filament that’s accurate to within a few percent.
For a quicker, less accurate method, think of the filament as a collection of individual circles wound around the spool. My example spool is 60mm wide, so that’s around 34 strands of filament, and the filament is stacked 12mm deep, so that’s around 6 strands of filament. 34x6=204, so the filament is wound around the spool 204 times.
The average radius of one circle around the spool is probably 34mm (right in between the inner and outer diameters), so good ol 2πr gives us an average circumference of 213mm. 213mm×204 windings is around 43,500mm of filament, or 43 meters.
It sounds very involved, but once you get the hang of it it’s very intuitive. You just have to know that a circle’s circumference is 2π times the radius, or π times the diameter, and multiply that by the estimated number of windings.
- Comment on Cheers Bro 1 week ago:
Tangentially related, you can also combine a basic knowledge of math with a basic knowledge of spreadsheets to make people think you’re the second coming of Einstein
I shat this out in 5 minutes. All the white cells are user editable. I could make it estimate annual gas costs by letting you adjust monthly mileage instead of speed and tweaking the math a bit. The average person would sooner close the application than try and make an interactive spreadsheet
- Comment on "Family Size" has no meaning anymore 1 week ago:
Could be photoshopped
- Comment on "Family Size" has no meaning anymore 1 week ago:
Brits don’t eat as much as Americans do because all their food is shit
- Comment on "Family Size" has no meaning anymore 1 week ago:
300 calorie main course
How’s life in 13th century Poland?
- Comment on Anon gets corrected 1 week ago:
“You” used to be that word, but mfs didn’t wanna say “thou” anymore so “you” has to pull double duty now
- Comment on Anon gets corrected 1 week ago:
Youse mugs
- Comment on Anon buys a TV without researching 1 week ago:
I’ve also heard people say that they’ll connect to any open wifi networks. People make up a lot of stuff. Just don’t tell your display device how to send any 1s or 0s to any server outside your home, and you’ll be fine
- Comment on 25 hours of snow. 2 weeks ago:
I mean the choices are snow ruins your life, sun ruins your life, or the Great Plains (the Great Plains have both plus tornadoes)
- Comment on I wanna ROCK 2 weeks ago:
Lmao gotem
- Comment on I wanna ROCK 2 weeks ago:
Dark matter
- Comment on Fucking pigeons 2 weeks ago:
Pigeons spend a long time in the nest, so if they survive long enough to leave, they’ll basically look like regular pigeons
At least, that’s what they want you to think
- Comment on Fucking pigeons 2 weeks ago:
Kinda, not really. In the wild, pigeons build their nests on cliffs, so they really only need just enough nest to keep the eggs from rolling off. That’s why they make dopey lil stick piles instead of proper bowl-shaped nests
- Comment on Anon's strict mom 2 weeks ago:
I like that this implies that OP’s mom uses an 8 bit counting system
I’m imagining her at a super expensive restaurant getting a bill for like $720 and thinking "wow, this only cost $208!
- Comment on Anon's strict mom 2 weeks ago:
With some light research, I’ve found that they’re actually worth around $0.10
- Comment on Behold currently! 3 weeks ago:
>thinks Aramaic is the same as Arabic
I hate it when I accidentally do a racism when accusing others of doing racism
- Comment on Anon's in trouble 3 weeks ago:
It very much depends on the size of the hole. 7 psi over 1 square inch is 7 lbs, but the same pressure over 100 square inches is 700 lbs.
For a naive estimate, the hole looks around 6 inches wide, which gives it an area of around 30 square inches, so there’s like 200 lbs of water pressure over the area of the hole. An even more naive assumption is that if you were “standing” over the hole in the wall, you would feel 200 lbs of pressure forcing you “down,” which I think most people could easily handle. I’m doing more than that right now!
Unfortunately I don’t know how to even start to calculate the force of the water on you as it rushes past you, but my gut instinct is that it wouldn’t be more than the total pressure in the hole
- Comment on Anon's in trouble 3 weeks ago:
Not at 15 feet. I don’t know enough to say how fast the water would be leaving that hole, but it’s maybe a couple hundred pounds of pressure. If he even got caught, it would be super uncomfortable, but he ain’t about to get ∆p’d
If you wanna see a real crab-in-a-pipe situation, look up that Byford Dolphin everyone’s talking about
- Comment on Anon's in trouble 3 weeks ago:
Only the Byford Dolphin ruduces an entire diver to a soup-like homogenate in 30 seconds
- Comment on Anon's in trouble 3 weeks ago:
It’s a difference of like 10 psi over an area of what looks like maybe 30 square inches, which would be uncomfortable to get caught in, but I don’t think you’re getting Buford Dolphined
- Comment on Anon's in trouble 3 weeks ago:
For more clarification, they were on the high pressure air side. The kind of dives they were doing involved long periods of acclimation to the different pressures involved, so the diving bell was pressurized to 9 atmospheres. Someone fucked up, and the door opened. 9 atmospheres turned into 1 atmosphere very quickly, and the only good thing is that it happened so fast that the deceased wouldn’t have even noticed
- Comment on Can't sleep at night 3 weeks ago:
Help I can already hear it sped up and fed through a lo-fi filter
- Comment on Can't sleep at night 3 weeks ago:
Yet more of my bones have been reduced to dust with the understanding that the average internet user is too young to have ever heard this song
- Comment on If God is all powerful and created human. How come God in endowed with human emotions? Shouldn't he or she be beyond that? 3 weeks ago:
What is it about theology that makes it worth less to analyze than something like fiction, or linguistics?
- Comment on If God is all powerful and created human. How come God in endowed with human emotions? Shouldn't he or she be beyond that? 3 weeks ago:
Trying to understand fictional media is a waste of time because it’s all made up.
Trying to understand linguistics is a waste of time because it’s all made up.
Trying to understand the economy is a waste of time because it’s all made up.
Hey wait this sounds like anti-intellectualism
- Comment on What are your bank details? 3 weeks ago:
Why did you post a screenshot of every argument I’ve ever been on on this platform?
- Comment on american culture 3 weeks ago:
I’ll throw that stone for you
The British education system is almost as bad as the American education system. The biggest difference between our cultures is that a lot of Americans are willing to point out how incredibly racist our country is
- Comment on Nom nom 3 weeks ago:
I try this, but I always get <3 mixed up with Ɛ>
- Comment on Shitposting 4 weeks ago:
If you wanna be on a list, start collecting old army field manuals. It’s one thing to say “we should start fire bombing McDonald’s,” it’s another thing to say “we should start fire bombing mcdonald’s, and here’s instructions on how to do it”
Not that we should be firebombong McDonald’s lol I would never recommend that
But I would recommend reading TM 31-201-1, especially pages 78-82
