Fire in Low Pressure Pure Oxygen

I burn various objects at various pressures of oxygen. Ignoring gravity effects for now.
Old video: • Video
Help me make videos by donating here: / codyslab
Follow me on Facebook: / codydonreeder
SubReddit: / codyslab
Twitter: / codyslab

[@DavidSprings]

Essence of Cody's Lab: "I wanted to see how dangerous X is under Y conditions."

[@_topshelf_5845]

How dare you assume there are only 2 conditions!! There are infinite conditions!!!

[@_topshelf_5845]

@Fred G. I was being sarcastic

[@_topshelf_5845]

@Fred G. 🤦‍♂️ I read your comment wrong

[@Dman6779]

how dangerous is metallic hydrogen when i light it on fire in a 20% fluorine atmosphere

[@johnbennett1465]

@@Dman6779 don't know but I would bet on either inert or explosive. That doesn't seem like a combination that would react slowly. Unfortunately it is not an experiment that anyone will able to try any time soon.

[@GrowingAnswers]

I was just thinking yesterday “wonder what happened to Cody...” been a while.

[@locouk]

I was wondering the same about Amazing DIY Projects too..

[@JimBob1937]

Based on his past videos showing personal/life issues along with creator burnout, he seems to have slowed down his content creation. More power to him though, health and well being is far more important.

[@petlahk4119]

@@JimBob1937 - I think he's also switched to longer-term projects that are harder to do and record, and that contributes, too.

[@GrowingAnswers]

@@JimBob1937 I was in his shoes. Did the same.

[@Rebar77_real]

If you need more Cody there was an hour long interview posted on r/codyslab yesterday I keep meaning to watch(sry op). Tales and origin story and what's next and whatnot. (With Lance Conrad if you're searching there in the future!)

[@TheFloatingSheep]

Cody doxxed himself in one dimension. We now know his altitude. If we're ever to be boiled down to a single dimension we know exactly where to find him.

[@kswiorek]

That's good, otherwise if we knew the other coordinates, we would have no idea if he is living in a mine underground or flying in a balloon

[@TheFloatingSheep]

​@@kswiorek I'm gonna watch the sun in his videos to figure out the other coordinates >:D

[@alexc8114]

I guess if we assume he is at ground level we could use a topographic map to find every place he could possibly be at that altitude... Lots of rings

[@TheFloatingSheep]

@@alexc8114 Yeah was thinking of that. It could definitely be useful in reducing the time it would take to find it.

[@TheFloatingSheep]

@@alexc8114 I mean all jokes aside it's kinda scary to think that most youtubers do indeed put enough data out there for someone with the will and knowledge necessary to find them. I mean even if we were to dox cody anyone would need to be an idiot to show up and intrude on someone's property in america, especially that side of america. You'd come out like swiss cheese. But it's an interesting thought experiment.

[@jeffpkamp]

This really gives you an appreciation for the heat part of the fire triangle. Nitrogen's ability to take away thermal energy without reacting really slows down the reaction.

[@KingJellyfishII]

Or fire square, as Cody says in the video of burning a self-oxidising fuel under vacuum

[@eelcohoogendoorn8044]

Is it primarily the cooling effect of the inert gasses? Or their shielding effect? My first guess was the latter but I cant really quantify that. Arguably in the initial stage of ignition the heat sinking into the gas is relatively insigificant compared to the heat sinks provided by the solids soaking up heat; so it should be possible to tease apart these effects experimentally.

[@jeffpkamp]

@@eelcohoogendoorn8044 One thing that strongly suggests to me that it's the heat loss making the difference is the candle experiment. If you watch the candle experiments you can see the wax heats up and melts in seconds, even at the lowest oxygen concentrations when the flame is tiny, and thus not producing much more heat than a candle burning the atmosphere. I am guessing this is due to the lower cooling via conduction with the atmosphere.

[@Turbochargedtwelve]

It is not just conduction to the atmosphere it is convection. As the air heats it rises, this draws in more air.

[@alandouglas2789]

@@KingJellyfishII video name?

[@jyk000]

You should try playing that intro backwards, so it burns into “Cody’s Lab”

[@ElExCHUCK]

I was going to write that lol

[@albinalteborn]

Now it looks like he is about to destroy his lab

[@g412bb]

Cody: Taking down videos on YT because of uncertainty of the results. Other channels : "But Content!..."

[@turbotaleggio8425]

THIS! So much respect for the true scientist spirit.

[@DancingRain]

Honest Cody is honest.

[@soundspark]

Why not make it unlisted and add a disclaimer to the description?

[@hadinossanosam4459]

Really impressed by how fast that candle burns... all the "oxygen accelerates combustion" demonstrations tend to show things that burn fast burn even faster, but seeing a candle that could burn for minutes just disappear like that really drives home the difference Now I want to put a large candle in there and see if burns in seconds instead of hours :)

[@GhostyOcean]

I suspect it would be on the order of minutes instead of hours or seconds. It is a lot of material to burn, but then again it's pure oxygen. Who knows without performing the experiment 🤷‍♂️

[@shleed]

Yeah, its interesting to see. Also, paraffin wax can even be used as fuel in hybrid rockets when burned with high pressure or even liquid oxygen (or sometimes another oxidizer like nitrous oxide).

[@jamiestuka2]

I think it's important to point out that it's not just the oxygen accelerating the combustion, but the lack of inert gas. Without the inert gas to take the heat away, the heat is stuck at the site of reaction i.e. the candle.

[@TheJohnreeves]

A large candle might just use up all the oxygen or add enough CO2 to slow it down. I too was surprised how fast that little candle went up though. What I don't get is how it burned up so fast but didn't make a big flame. Like, I would expect if the combustion was fast, it still has to burn through the same amount of fuel. Did it just create an immense amount of heat?

[@TheJohnreeves]

@@jamiestuka2 Maybe that's why the candle "burns" so fast. It isn't actually burning all the wax, it's melting most of it into a puddle. There was a little puddle there which I don't think there usually would be when burning a candle like that.

[@brainiac1595]

So early, I can still hear Cody's methane plant bubbling

[@MarshallisLost]

Shh were not supposed to share that

[@ficolas2]

Patron thing? He's made another methane bioreactor?

[@georgevavouras]

@@ficolas2 heyyyyy, hello there!

[@ficolas2]

@@georgevavouras eyyy the world is a small place

[@georgevavouras]

@@ficolas2 hahaha👍👍

[@Nighthawkinlight]

That was really neat just to watch the candle extinguished by vacuum

[@glenncaughey5044]

Have you ever had a candle in a jar and put the lid on it? 🙂

[@hugs4drugs205]

Ngl I think some of the best scientific research has had some of the least dramatic reactions, I'm just here for that sweet sweet data

[@johns2038]

@@glenncaughey5044 that's not a vacuum that's just a buildup of co2 which extinguishes the flame

[@Metal_Master_YT]

@@johns2038 or more correctly, an exhaustion of oxygen which no longer allows combustion.

[@lejibus]

"Ignoring gravity effects for now." Looking forward to that.

[@nameeman207]

"Today our goal is to burn some bits of paper." Sound reasonable , I'm in!

[@alirezaeskandari2287]

I think all people agree that we want an update on chicken hole base 🙏

[@robmurg]

In the geological past oxygen concentrations in the atmosphere have been estimated at up to 35% Have you ever looked at combustion in that region? I wonder what a forest or brush fire would have looked like at that time.

[@paradoxequinox4104]

Probably helped kill off a lot of stuff.

[@lajoswinkler]

Those forest fires were a lot more thorough than today. Much less charred wood leftovers.

[@captainobvious5016]

I’d be really interesting in seeing him do experiments like this in atmospheres equivalent to what it was like back then

[@joaopedrodebarrosdaeira5466]

I was thinking about that too, it should be interesting to see

[@robmurg]

@nyzsynawi noj I hadn't heard about higher pressures. Plants would prefer more carbon dioxide rather than oxygen I would think. The fossil record of giant insects is part of the evidence for higher oxygen levels and maybe higher absolute pressure would also be supported by that? Would certainly make flying easier!

[@nattsurfaren]

Learned something new: Silver doesn't burn in pure oxygen.

[@SpudLab]

Learned something new: Silver Burns.

[@callum9513]

Learned something new: Fire!

[@w0ttheh3ll]

Learned something more interesting: copper does! Now I want to see a video of that.

[@pabloarroyo1023]

I wonder how that happens given how quickly silver tarnishes in the air

[@nattsurfaren]

@@pabloarroyo1023 According to chemistyexplained website it reacts with sulphur compounds in the air.

[@anesthetized7053]

that candle looked really cool at low pressure. it actually made the fire look like the sci-fi version of what i though plasma was as a kid.

[@B.McAllister]

Alternate title: An Insufficient Way to Make A Lightbulb.

[@saveahearserideagoth]

😂😂

[@5thearth]

Just wanted to mention I appreciate your dedication to testing and showing the null hypothesis in these tests. A lot of people wouldn't have bothered but it's an important part of the process.

[@whopineapple8677]

“Let’s turn the light off so we can see a little better”

[@DancingRain]

With the lights out, it's less dangerous. Here we are now, entertain us. :P

[@shock789]

Lol noticed that as well

[@theyoten1613]

Cody's lab is like a real-life artificer and the Earth is richer for having him.

[@gomigaming]

You god damn mad man you’re right

[@masacatior]

He's made a discovery

[@sephalon1]

Theory: The candle burns a lot faster in pure oxygen at the same partial pressure as air because in air, the heated unreactive gasses cause the hot gas to rise faster instead of spreading out evenly, which melts the wax.

[@bearwynn]

*hypothesis

[@Jacob_graber]

I'd hypothesize that an additional factor will be the presence of inert gasses slowing down the rate at which fresh oxygen can reach the site of combustion. To test your theory, you'd want to use inert gasses with different specific heats in mixture with oxygen. If your theory is true, then gasses with lower specific heat should cause combustion to speed up, since for the same amount of heat energy input they will have a higher final temperature. This should theoretically increase the buoyancy of the flame.

[@AngDavies]

@@Jacob_graber less preventing the oxygen getting there, and more that the heat produced in the reaction is diluted by the nitrogen. The theoretical temperature of a flame is much much higher in oxygen than in air- every part of oxygen that goes in brings three parts nitrogen, that shares the heat with the combustion products, cooling them. Something like 2500c max possible for an air-acetylene flame, Vs 3500c for an oxy acetylene (adiabatic flame temperature) Heat capacity enters In to it, to get how the energy is distributed

[@skeetsmcgrew3282]

But if that were true, wouldnt that mean that holding a candle completely upside-down should make it melt at a rate comparable to this experiment?

[@schrabad]

Great comment.

[@kotori87gaming89]

This reminds me of a prank submariners used to play. When bleeding oxygen to improve the ship's atmosphere, you could put an unlit cigarette on the oxygen outlet nozzle and fill it with oxygen. Give it to your buddy when he wants a smoke, and the whole thing will burn up in seconds when he lights it. I've never seen this myself since smoking is banned on submarines and we don't use oxygen bleed anymore, but some of my older shipmates told a lot of stories like this.

[@TheCarDemotic]

I’m surprised smoking was allowed on submarines in the first place. Sounds like a bad idea to smoke in a sub

[@gantz4u]

@@TheCarDemotic Back when men where men and you didnt want to be locked in a submarine with a bunch of big bad dudes that need a cigarette..based.

[@arturjogi2667]

​@@gantz4uback when men were charred corpses on the sea floor :)))

[@aaronmett5678]

Another aspect of the fire being more vigorous could be due to there being less heat lost due to convection, so there is more heat available to drive the combustion.

[@jackroutledge352]

Good point. Countering that of course, will be the fact that there is less convection driving fresh oxygen to the flame. So there's less "blowing out" but also less "fanning the flames".

[@aaronmett5678]

@@jackroutledge352 I was more thinking of the air that is immediately surrounding the flame but not necessarily participating in the combustion, is less able to transport heat away. But you also make a good point too.

[@shaunlastname391]

@@aaronmett5678 air us not conductive to heat like that

[@PandemoniumMeltDown]

Driving around, in the mountain, I was looking around, seeing a land for sale, I wondered: "where the heck could I get a "trespassers will be used for science experiments" sign"... I'd buy that! Ah Cody, you're great!

[@opcn18]

I would have liked to have seen a fire in a pressure chamber with an extra 15 psi of nitrogen or other inert gas added.

[@lukahierl9857]

Normal air at double and halfe pressure would be interesting.

[@Adskdnweotland]

yes!

[@minigpracing3068]

Yes other combos at higher than atmospheric would be neat (maybe) too.

[@VoxNerdula]

Fart in the chamber too. This is to simulate the presence of astronauts.

[@theodorekorehonen]

@@VoxNerdula Also because farts are funny

[@glenngriffon8032]

"This goes against what I found in the first video" Well this is why we do science and why we test so much and so rigorously.

[@gramursowanfaborden5820]

see this is what is interesting about science, when unexpected things happen which you learn from. most science "experiments" nowadays have been replicated so many times there's no point in carrying them out other than to farm youtube views or demonstrate principles to uninterested school children.

[@glenngriffon8032]

@@gramursowanfaborden5820 yes but even so testing rigorously is part of science. If we did an experiment and knew for sure what the results would be and got something unexpected that's exciting. What i find funny is average people who don't understand how science works always laugh when something happens that scientists didn't expect or didn't know was there as though scientists are just always sitting around smugly laughing about knowing everything there is to know unti ha ha mr. brilliant i-know-everything scientists find out there's something out there they didn't know about so that proves science is a lie....some...how. They don't seem to realize that one of the main reasons scientits test is to discover something they didn't expect. When something is disproven in science scientists are typically excited because it's a chance to learn something new. To the average person being proven wrong is devastating, it's a sign you were weak. To a scientist being proven wrong is exciting, fun, adventurous. It means something new to find.

[@parallaxperception4971]

@@glenngriffon8032 lol scien"tits"

[@parallaxperception4971]

@@glenngriffon8032 but i agree, society

[@DearHenryA]

What if you used one of the "special" birthday candles that relight when blown out.

[@garethbaus5471]

If memory serves those have a small amount of solid oxidizer in the wick so it might even burn in a vacuum to some extent.

[@shaunlastname391]

The cake would collapse under the partial pressure and make a mess though

[@sergeigontcharenko3476]

Does the reduced atmosphere help with melting the candle, reduced convection means more heat absorbed.

[@theCodyReeder]

Does Look like that may be the case.

[@MLeoDaalder]

And I suppose a lower boiling point for the wax, exposing more solid wax to be melted sooner.

[@AngDavies]

As well as, Hotter flame= more of the energy is in the form of radiation as the radiated energy rises as a 4th power of temperature means the energy has an easier time melting the candle because it can go down more

[@ericmoore9952]

Also, less heat absorbed by N2, more available for heating wax.

[@jokeking09]

@@theCodyReeder Would a larger candle burn more normally then or just burn the wick? What about those crackle wicks? Or those 48-72 hour horizontal candles? Incense? Sparklers? The Candle and Other Flame Based Lighting community demands answers

[@alirezaeskandari2287]

Cody , watching your videos makes my day. You're my inspiration for learning science and also bcz english is not my first language (my third) you have been my inspiration for learning English too 🙏 Thank you so much Wish you all the best Alireza from Iran

[@3iggystheorem232]

Cody the English enthusiast

[@hunterwilhelm]

Paper: 3:30 - Control (1 atm or ~29.9 inHg) w/ regular air 5:10 - Control 2 (1 atm or ~29.9 inHg) w/ pure oxygen 6:30 - Low-pressure (~6 inHg) w/ pure oxygen 7:53 - Low-pressure (~3 inHg) w/ pure oxygen 9:00 - Low-pressure (Full vacuum) 9:35 - Low-pressure (~0.5 inHg) w/ pure oxygen 10:10 - Gradient pressure w/ pure oxygen Steel wool (from the intro): 10:52 - Low-pressure w/ pure oxygen Candle: 11:50 - Control (1 atm or ~29.9 inHg) w/ regular air 13:00 - Low-pressure (Full vacuum) 13:32 - Low-pressure (~3 inHg) w/ pure oxygen 14:40 - Low-pressure (~1 inHg) w/ pure oxygen

[@ojtheaviator1795]

Before reading the title, I had no idea I wanted this. I've only just now read the title and feel intense curiosity - I must know what a pure oxygen fire is like at low pressure

[@philkensebben157]

Most kids: Write their names in the air with sparklers. Cody: Writes his name in metal and electrocutes it into sparklers.

[@TGJPyt]

Cody makes anything Cody wants!

[@n7565j]

It's amazing how efficient turbine engines are at compressing that rarified air @ 40K + feet!!! This video REALLY brings home how far we've come at building efficient engines!!! Well done Mr Cody!!! :-)

[@lucasb0rges]

What would be interesting is too see how instruments, music does sound while in different atmospheres like pure Oxygen.

[@Arcanefungus]

Lets try a violin. Should be nice until the heat from friction ignites the bow hair

[@3iggystheorem232]

Didn't he make his sister play some strings resonating in another gas?

[@kirkmbutterfield]

@@Arcanefungus thats horse shit

[@Freizeitflugsphaere]

Nice to finally see a new video of you explaining the world👍🏼💚 love from Austria 🇦🇹

[@SootySweep22]

Throw another shrimp on the bar-bee!!

[@FreeTimeFromSwim]

That wax looked beautiful. It will look amazing to see something fly to space on that.

[@ThankGood123]

When Cody says "of course" I feel feel like an idiot. I still love the videos.

[@stickemuppunkitsthefunlovi4733]

No, when Cody says of course, you know your an idiot. As we all do. I find it funny Cody's even bothers with us mere mortals. He must like playing with us.

[@alexglase765]

As if he’s trying not to offend us for stating something obvious 🤦‍♂️

[@stickemuppunkitsthefunlovi4733]

@@alexglase765 you're like Sheldon cooper right? Highly intelligent but you don't get irony do you? Like we are joking and the irony of you stating something obvious about someone stating something obvious to people having an OBVIOUS JOKE definitely confirms you're sheldon cooper.

[@kaitlyn__L]

“It still burns faster even at lower pressure” and suddenly I’m remembering the Apollo 1 tragedy

[@VAXHeadroom]

Yep. This exactly.

[@daanwilmer]

Apollo 1 was pure oxygen at more than 1 atmosphere of pressure, though. No wonder it got out of hand so fast :(

[@kaitlyn__L]

@@daanwilmer indeed! Even the velcro burnt away in less than a second. The real thought I had was “huh, so if they’d had a fire in space back when they had pure oxygen at low pressure, it still would’ve been very bad. Sure am glad Apollo 1 made them change it”; and THAT reminded me of Apollo 1. But that makes for a much longer comment :P

[@ExperimentIV]

@@kaitlyn__L i dont know if you know about the fire on space station mir, but it’s an interesting read, and with a much happier ending.

[@ehsnils]

R.i.p. Grissom, White and Chaffee.

[@TGJPyt]

Cody in 5 years: Hey everyone welcome back to Cody’s lab today we’re going to be flying to Mars!

[@IllIlllI]

I love these experiments! So incredible to see that oxygen and pressure are responsible for combustion, always “knew” but never understood! The way the oxygen ignites and completely engulfs the paper before burning it is just mind blowing! Also like how oxygen turns a candle into a thermite like torch! Kinda makes you reevaluate and appreciate the seemingly “random” conditions we experience on earth, I don’t want to imagine what would have happened if we had a higher concentration of oxygen or a lower concentration of other gas...

[@Aaron-zu3xn]

by far the best demonstration of what a high oxygen environment does to a burning object,typical demonstrations show things that burn really fast and you can't tell how big of a difference it really makes

[@davidd3441]

I would love to see Cody attempting to make a piezoelectric battery. Love the videos.

[@Nuovoswiss]

Piezoelectric batteries aren't a thing. The amount of charge moved in a piezoelectric material is so small that it leaks between the faces in a fraction of a second. This is why piezos are only used to generate short pulses of electricity from sharp impulses, or for measuring time-varying inputs with frequencies higher than ~1 Hz.

[@davidd3441]

@@Nuovoswiss yes, this I understand. Was hoping Cody might look into John Hutchenson who was able to make a low voltage battery cell with a "paste" of materials containing crystals. Any amount of voltage would suffice. I thought Cody might get a kick out of trying.

[@Nuovoswiss]

@@davidd3441 That "crystal battery" stuff is nonsense, they mash together buzzwords (like "piezoelectric") to make it sound like they have some actual mechanism, but anyone who knows what those terms mean understands that it makes no sense. Cody has made videos debunking flat earthers, so maybe he would enjoy disproving that.

[@davidd3441]

@@Nuovoswiss that would be awesome

[@klmrk9961]

So cool that the candle burns almost instantly in only oxygene, even at low pressures.

[@docdetroit146]

Good to see you Cody. Love your channel

[@Jacob_graber]

Awesome classic CodysLab video. Thanks Cody.

[@jerry3790]

I’d love you to revisit an oxygen fire in a methane atmosphere next

[@robson6285]

WoW this is old-Cody-style superinteressting!! That pure setup for that pure scientific question so pure no-nonsence logically filmed for the most pure measuringresults, of course with that pure understandable explaining... Yes indeed that is pure Cody's lab!!

[@DannyBoi737]

I always look forward to Cody's videos. Always peaks my interest!

[@Flederratte]

Awesome to see an update! I actually watched the original video back then :) It is even more awesome to have a new upload from you :)

[@daniloscapellato]

Since Earth's atmosphere is 78 percent nitrogen and 21 percent oxygen, what would happen if we change nitrogen for something else like argon. Would it affect us even if the oxygen percent is the same? Does the nitrogen we also breathe has a small importance for us while being breathed or just the oxygen? I'm quite curious.

[@MrSaliVader]

I don't know about us but plenty of organisms use the nitrogen from the air to make aminoacids, which then get passed through the food chain... So at the very least we'd probably cause a biological collapse

[@switchamafuck78]

All life that is currently on earth has evolved to breathe this exact combination and ratio of gases, so changing them around in such a huge way could be devastating, or have negligible effects. Replacing it with argon tho means that electrical arcs can form much easier since argon is more conductive than nitrogen which could be a pretty big problem

[@theCodyReeder]

Sounds like another video. 😉

[@Arcanefungus]

Apart from the ecological issues about nitrogen being important for the ecosystem, as far as I know, Argon is a weak narcotic, like laughing gas

[@chitlitlah]

Deep divers breathe a mixture of oxygen and helium so they don't have to worry about getting nitrogen narcosis. Humans just need to have oxygen come into their lungs and carbon dioxide get pulled out.

[@electronicsNmore]

Interesting experiment!

[@TGJPyt]

I like your youtube channel!

[@hipposlapper]

Dude, your videos are awesome! I have been binge watching them, thank you so much for making them.

[@Jedda73]

The amount of heat produced by that last candle to melt it so fast was amazing.

[@Arcanefungus]

5:17 Oh hey, you made fireworks on accident...

[@among-us-99999]

What would happen at higher than atmospheric pressure, with the same partial pressure of oxygen?

[@jacobwhitlock5060]

Boom

[@JeremyMcMahan]

Awesome experiments Cody. Thanks for sharing!

[@floris7055]

Such an elegant series of experiments, lovely!! Thanks a lot Cody :)

[@piranha031091]

I guess heating the nitrogen takes that heat away from the reaction. Things burn a little colder, and therefore slower.

[@SuperBrainAK]

wow, that is truly amazing! I think O2 would be my favorite gas to experiment with. I was watching a spacewalk livestream recently (ISS installing the first batch of the new solar panel mounts) and they were filling the spacesuits with pure oxygen, what is the science behind humans being able to breath pure oxygen? does it need to be lower pressure? and why do they do that for the spacewalks? I would make the simplest assumption of them being able to fit more O2 in the suit and not have to worry as much of CO2 asphixiation occuring. Thanks for this awesome experiment, burn some more things!

[@Furlucis115]

If I remember right (if anyone with sources wants to correct me, go for it) the deal there is: The human body's oxygen intake ability is pretty much completely dependent on the /partial pressure/ of the oxygen, so, the 'total amount' (per volume), not the concentration. so 1 atm at 20% O2 would be exactly equivalent to 0.5 atm at 40% O2, and to 0.2 atm at 100% O2. And I think you're right: since 100% oxygen works, why bother carrying around the nitrogen? It doesn't provide a benefit. (except for fire resistance, evidently.) But also: any leaks happen much much slower at lower pressures. This especially matters because there are a couple of joints (the wrist joints, and maybe one other?) which are bearings that just can't really be made to seal perfectly. So they leak, normally. always. so having those leaks happen much slower makes a big difference in how much gas you're just inevitably blowing into space. Bonus fact!: while I'm pretty sure humans can breathe pure oxygen at 1atm pressure without ill effects, at /higher/ partial pressures (say, when diving) it's toxic! and at /even higher/ partial pressures, nitrogen makes you act drunk! Deep diving gets complicated.

[@SuperBrainAK]

@@Furlucis115 thanks for the info, that is pretty neat to know, the wrist bearings in space suits is something that is super interesting.

[@ranjaxwolf9725]

Finally more Cody!! 💚 love your content, greetings from South Africa

[@w0ttheh3ll]

This is the kind of *amazing* video that I subscribed for! I had great fun watching it.

[@redmuscle99]

Cody: "Let's pull another vacuum..." Man with digeridoo behind camera: *_deep breath_*

[@SamSamuylik]

Why do vacuum pumps always sound like the piston is just rattling around in the cylinder?

[@tommysmith8801]

Most are rotary vane and not piston.

[@rdear]

I’ve been binge watching your precious metals recovery/refining series over the last few days so I’m pumped for another awesome video from your lab!

[@kaissos5]

This is so cool! I went on a deep dive with your videos with a lot of excitement and gratitude. Thanks for all of this cool stuff!

[@hughmann3952]

"The only difference between science and screwing around, is writing it down." -Adam Savage

[@chootem4893]

Cody I haven’t seen you since 2017.. what happened?😢

[@gw5479]

He been posting

[@kw9849]

That's on you, he's been posting videos!

[@Sabi1234567890Asdf]

@@kw9849 no it's on youtube I have not been recommended a video for a year I have to search for him

[@chootem4893]

@@kw9849 I think he’s shadow banned because I’m subscribed and I haven’t got recommended a video since

[@LeglessTurtle]

Been missing your videos Cody. They’re my favorite content on KZbin by far.

[@rucky1419]

Your enthusiasm is so heartwarming Cody

[@tracybowling97]

I love to see your genius @ work!

[@deanjamieson7814]

thanks for the upload Cody

[@mikefirthy]

Cody you're a genius mate ....love to see more geology videos ...great work

[@jondough76]

Glad to see a new video. I hope things are well with you and your family.

[@zmc33]

cody....your channel is awesome.

[@gnatdagnat]

Thank you for the video cody your channel is an inspiration to me!

[@guyh3403]

Thank you very much. 13:40 amazing to see the O2 rushing in from the sides made visible by the smoke.

[@user-ry5gr2sq4v]

I love the effort you put into these intros, Cody!

[@foxylady4163]

Omg nearly 2 million subscribers bro! Iv followed u when you first started, watching you grow and be known worldwide is phenomenal, keep it up!!

[@DSlyde]

I'm so glad you revisited this, I really enjoyed the old video but it directly disagreed with the NASA test reports. Seeing the effect NASA was describing visually really puts the data in context. Awesome video!

[@mrmatt2525able]

Damn I love your videos!!! Hope all is well Cody!

[@Chlorek11]

Codyyy! Great to see that you are alive! :D Can't wait for next videos! I love u my dude! Have a great day!

[@jasonsteppler3230]

you know, I really have to commend you on your efforts. I could not imagine how hard it is to come up with something new and exciting for your viewers to watch. I like how you choose to put a video out every 2 weeks or more, it helps keep your videos entertaining, informative, and fresh without being watered down by random stuff... Thank you for doing what you do!

[@OnTheShouldersofScience]

Great video again, Cody!

[@smeggerssmeghead3100]

Great to see a Cody's lab vid, thanks Cody

[@bartakisom]

Love your videos!

[@willrobbinson]

fascinating to watch well done , also welcome back

[@0SPACE0BAR0]

Great video as always!

[@BensweiaRD]

Glad to see you posting again. You are an amazing person in the science and education world! Thank you for ever thing you have done!

[@Deez-Master]

Nice experiment and interesting result, thanks for posting

[@dwaynezilla]

Oh wow, I've been wondering this exact thing for quite some time, but lacked basically everything I needed to try it (including the motivation). So pumped you have it here!

[@markchinguz4401]

Haha. Pumped

[@zileanicathun]

glad i found ur channel what a gem

[@rcs368]

Love when you are doing these cool little labs. Great job and the dynamics of this entire thing are fascinating. Not fascinating because they exist, but fascinating because one never thinks about such a material, under x circumstance, and the outcome. The results made me smile

[@jansenart0]

Some future classic Cody right here. Glad to see it!

[@Zimke42]

Nice setup and great controls. Nice one Cody ;)

[@CosmicCow09]

awesome vid, very interesting to watch and its cool how it feels like we are exploring it with you

[@fuduzan5562]

Well that was fascinating and cool as hell. Thanks for sharing!

[@IanGrams]

Cheers for making an effort to reproduce a past experiment with an improved setup. Definitely an important part of science. Also the way the candle flame rounded out and became more blue as you vacuumed out the air was pretty cool. Reminded me a bit of flames in low gravity taking a spherical shape.

[@blar2112]

Glad to see you there again Cody!

[@yaykruser]

Love this channel 😍

[@wastedyears282887]

Awesome video. Thank you.

[@TXROOTSALEX]

I discovered this channel a few weeks ago. I am slowly working my way through all of these masterpieces. I hated school but this makes science fun and addictive. Keep it up! My new favorite KZbin channel!