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or photons. heat is just energy in a different form
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Jul 27, 2022 18:37
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PokeJoe posted:wait till you take quantum mechanics I watch quantum leap. does that count?
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Jul 27, 2022 19:56
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i dont think there's anyone that puts as much effort into youtube videos as captain disillusion
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Jul 27, 2022 20:07
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Corla Plankun posted:one thing i never learned in EE undergrad was how heat works. i got a little of the ideal gas law stuff but to this day i have no idea how insulation and heat conductance and radiant heat work and i wish i did apologies in advance lol insulation is a function of distance and the main way insulation works is by trapping non-circulating air in a medium that doesn't transfer heat well itself wool is insulating because it traps air that isn't circulating much, and so little heat is being lost. the actual wool strands themselves do transfer heat, but not particularly well, and so the ability for heat to cross both the non-circulating air and the wool strands is minimal, and you can think of insulation as constricted flow of heat. the way puffer jackets work (or down duvets etc) is purely through being voluminous, and the duck feathers are basically a very effective method for creating lots of non-circulating air, but also being able to be squished and bounce back to their original form, and taking up gently caress all space. the technology isn't particularly advanced, again, the distance created is the most important variable another thing to consider is how a thermos works. heat is conducted thru one of three methods - convection (like air or another fluid as a go between), radiation (all things above absolute 0 radiate to some extent) and conduction (touching), and so a thermos attempts to create a vacuum, attempting 0 convection, and mirrored surfaces, attempting 0 radiation, and it's impossible to totally minimise conduction, but they do that by having the inside cavity minimally attached to the outside. PokeJoe posted:it's electrons, they move the heat it's true, which is why metal conducts heat well. and things like glass, don't as much, and so making glass into a wool and keeping it somewhat fluffy, you create building insulation. once again, trapping non-circulating air and certain things have an ability to hold heat better than others too. heat is defined by how much a thing will change the reading on a thermometer, which is not the same as the amount of heat energy in a thing. water and air at 20c will make a thermometer read 20c but water holds significantly more energy per volume than air. im not sure if this is purely a function of density but anyway, something to take away from this is why if you stand on tiles it feels cold but carpet does not. if something feels cool to touch even though it's the same temperature as everything else, it means it has a high capacity to take in heat, and when you stand on a tile there is a net flow of heat energy from your feet to the tiles. if you stand on carpet, there is significantly less capacity and ability for the carpet to take energy from your feet, so it feels somewhat neutral PokeJoe posted:wait till you take quantum mechanics I only "get" qm on a pop-sci level but drat, when my mind was first exposed to the double slit experiment and grasping that particles can interact with themselves and create diffraction patterns.. drat that was a moment for real. I felt so enlightened haha
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Jul 27, 2022 23:29
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an important finding of quantum mechanics is that the dz2 molecular orbital looks like a butt plug
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Jul 27, 2022 23:36
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lol organic chemistry relies on understanding orbitals, well, at least knowing they exist and are the reason why molecules form and why they arrange the way they do, but I'm glad I didn't actually have to try to work any of that poo poo out, am quite content to just believe that some people worked it out before me and I'll take at their word for it
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Jul 27, 2022 23:40
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nature has a naturally flared base
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Jul 27, 2022 23:44
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echinopsis posted:organic chemistry relies on understanding orbitals, well, at least knowing they exist and are the reason why molecules form and why they arrange the way they do, I remember taking Stat Mech my last semester of undergrad after 2-3 semesters of Quantum coursework, and one day I suddenly felt like I could derive 80% of what I learned in freshman chemistry. I really ought to go through my quantum/statistical mechanics texts and then re-approach chemistry. Having a deeper knowledge of the physics made a lot of stuff that got handwaved into formulas in chem make a lot more sense, even though I hadn't taken a chem class in 3 years at that point
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Jul 28, 2022 00:11
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PokeJoe posted:nature has a naturally flared base
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Jul 28, 2022 12:01
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https://www.youtube.com/watch?v=cRZR_TeVi5Y
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Aug 1, 2022 03:31
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https://www.youtube.com/watch?v=3Uc4_ATDjoU
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Aug 24, 2022 02:17
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https://www.youtube.com/watch?v=fSxQHQ_1gX4
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Aug 30, 2022 04:01
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I was just made aware of the existance of 'high entropy alloys' and as a frustrated materials scientist i find the whole thing fascinating https://www.youtube.com/watch?v=v1B4VbLX9rA
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Aug 30, 2022 04:50
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materials scientist? you mean a computer programmer who does some woodworking on the weekends?
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Aug 30, 2022 06:24
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when i went to college at first i wanted to be a materials scientist but, well, time makes chumps of us all.
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Aug 30, 2022 06:26
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rotor posted:time makes chumps of us all truer words have never been spoken
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Aug 30, 2022 07:06
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this is actually way smarter and sweeter than i figured it would be, and i enjoyed watching this video about how anybody older than me is a grimy pervert, and how anybody younger than me is a depraved degenerate. also she's extremely beautiful
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Aug 30, 2022 07:25
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https://www.youtube.com/watch?v=eYO19tYYqXk
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Sep 1, 2022 04:35
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non-mechanized mass food prep/cooking is mesmerizing to me for some reason https://www.youtube.com/watch?v=_lQULSoa0Co
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Sep 1, 2022 11:27
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I like this dork's videos, it's all ridiculously overcomplicated solutions for made up problems that didn't need solving, usually involving lots of engineering, EE, and programming. https://www.youtube.com/watch?v=Gu_1S77XkiM I missed this video from a month ago but this one is building a robot to solve a giant jigsaw puzzle automatically. Interestingly nobody seemed to pick up (hehe), and he doesn't mention, that this looks and works like a giant pick and place machine. So most of this has been worked out already before (picking up components with a sunction cup, cameras to identify the parts, feed mechanism etc). I think the biggest challenge would be actually computing solving the 5000 piece in a reasonable amount of time. It's over a month alter so it's clearly taking a while  Oneiros posted:non-mechanized mass food prep/cooking is mesmerizing to me for some reason Uzbekistan is really fascinating from that (and many other) aspects, so definitely visit if you have a chance. That channel also has some other cooking videos, check out the pilaf one for example. Now that's a bigass wok. https://www.youtube.com/watch?v=0TDLJ7YJOnA E: typos and wording, I guess I was sleepy mobby_6kl fucked around with this message at 16:57 on Sep 9, 2022 |
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Sep 9, 2022 13:07
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mobby_6kl posted:I like this dork's videos, it's all ridiculously overcomplicated solutions for made up problems that didn't need solving, usually involving lots of engineering, EE, and programming. this was good but also fuckin hell. it's so impressive in so many ways,
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Sep 9, 2022 14:37
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echinopsis posted:this was good Dude is in the extremely rare category of youtuber who makes crazy stuff while also being aware of how stupidly dangerous that stuff can be. https://www.youtube.com/watch?v=gnwIiw3Rz3I
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Sep 9, 2022 15:03
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Stuff made here guy seems pretty cool. plus his wife routinely dunks on him in his videos, so thats good
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Sep 9, 2022 15:59
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LanceHunter posted:Dude is in the extremely rare category of youtuber who makes crazy stuff while also being aware of how stupidly dangerous that stuff can be. Jim Silly-Balls posted:Stuff made here guy seems pretty cool. plus his wife routinely dunks on him in his videos, so thats good
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Sep 9, 2022 16:59
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Oneiros posted:non-mechanized mass food prep/cooking is mesmerizing to me for some reason you should look at the langar at the golden temple in amritsar. https://www.youtube.com/watch?v=TT-N5wl0l-s
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Sep 9, 2022 18:11
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mobby_6kl posted:I thought for sure you'd link the "I did a thing" channel, but he's way on a different side of educational vs legit dangerous curve: https://www.youtube.com/watch?v=QwrZuUiSXEI I'd never heard of that guy. Like, I know he's just doing a bit throughout, but that video was still bad for my blood pressure. (Those absolute  at him seeming to actually brag about the welds at 3:11.)
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Sep 9, 2022 18:48
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mobby_6kl posted:I thought for sure you'd link the "I did a thing" channel, but he's way on a different side of educational vs legit dangerous curve: https://www.youtube.com/watch?v=QwrZuUiSXEI Edit: ah this is the one I was thinking of: https://www.youtube.com/watch?v=ve6xV0eXzQs mystes fucked around with this message at 18:57 on Sep 9, 2022 |
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Sep 9, 2022 18:55
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That I did a thing guy beat the poo poo out of a children's cartoon animator https://www.youtube.com/watch?v=ihICfboGsBw
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Sep 9, 2022 19:09
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PokeJoe posted:That I did a thing guy beat the poo poo out of a children's cartoon animator
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Sep 9, 2022 19:18
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PokeJoe posted:That I did a thing guy beat the poo poo out of a children's cartoon animator erik from internet comment etiquette also fought in that event and got wrecked lol
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Sep 9, 2022 19:26
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mystes posted:Oh cool an insane video of someone making a giant beyblade out of a saw blade that's somehow not the insane video of someone making a giant beyblade out of a saw blade that I was thinking of. I got irrationally angry every time he walked in front of the spinning blade before releasing it.
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Sep 9, 2022 19:28
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`Nemesis posted:erik from internet comment etiquette also fought in that event and got wrecked lol i bought a fightin' soy boy shirt. it rules
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Sep 9, 2022 21:02
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mystes posted:why is this a thing Lowtax wasn't available
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Sep 9, 2022 21:27
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mobby_6kl posted:Lowtax wasn't available well thats a grave mistake
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Sep 10, 2022 02:32
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mystes posted:why is this a thing it's like a dumpster version of celebrity desthmatch
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Sep 10, 2022 02:45
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michael reeves pounding that older nerd was pretty funny tho
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Sep 10, 2022 03:22
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yeah he went full goblin mode
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Sep 10, 2022 03:23
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Michael Reeves is ONLY goblin mode
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Sep 10, 2022 05:08
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mobby_6kl posted:Lowtax wasn't available spineless bastard
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Sep 10, 2022 06:48
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Cliff Stoll is like a Mathmatic Pixie Dream Professor. https://www.youtube.com/watch?v=3V84Bi-mzQM I love his ridiculous exploration of silly minutia.
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Sep 10, 2022 18:31
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