A few comments: 1: Even if you could inhale, with more than a couple feet of tube you are essentially just breathing in your own breath that you just exhaled. So you’d have to exhale outside the tube to survive. 2: Yes, I meant 4.33 not 433 psi 😂But still thousands of pounds of force you are pushing against. 3: The tube wasn't crimped shut as far as I could tell. Every time I jumped in, I could feel the air being sucked (pushed actually) out of my lungs as I went deeper. So the tube was open enough to squish the air out of my lungs. But maybe the kinks increased resistance so that we could have gone a bit deeper with a rigid pipe. But I'm guessing not much more than one or two feet.

@vision-OS

11 ай бұрын

Is going 10 feet deep deadly?

@NaVoronda

11 ай бұрын

That’s what I always thought was the issue. That you couldn’t push the volume of are contained in the entire tube. Never thought about the pressure…now I fell dumb. At least you fixed my ignorance!

@MrCommentGod

11 ай бұрын

Ok

@MrScottev

11 ай бұрын

Why wouldn't you breath out through your nose?

@davidscott5903

11 ай бұрын

I came here to mention the pressure discrepancy. 👍

I tried to breath through a water hose when I was at bottom of the pool when I was younger. Yeah, I was perplexed why it didn't work at the time.

@CharlieKellyEsq

11 ай бұрын

Pressure against your lungs will not allow you to breathe in

@CharlieKellyEsq

11 ай бұрын

If you have any law questions go ahead and ask, I specialize in bird law though

@cabageno.2

11 ай бұрын

Well if you got enough water into your lungs the pressure would equalize right

@IdentifiantE.S

11 ай бұрын

@@CharlieKellyEsqOhh ok

@batatanna

11 ай бұрын

@@CharlieKellyEsq is it legal to marry interspecies? I'm a cockatoo and want to marry a chicken, would like to know the ins and outs abt it.

It's also important to note that if you ever plan on breathing air you are compressing it's important to use an oil free compressor

@deepsgnips

11 ай бұрын

Yep, better just not do it 😅

@LawrenceTimme

11 ай бұрын

The oil lubricates you lungs to help the air slide in easier

@deepsgnips

11 ай бұрын

@@LawrenceTimme 🤣🤣🤣 you're so right!! Then an oil free compressor Is NOT a good idea 🤪

@chaos.corner

10 ай бұрын

Just use olive oil. Maybe a little garlic and a sprinkling of parmesan cheese. Delicious.

@lapidations

10 ай бұрын

The replies, omg

My brother is an underwater welder and believe me, this stuff is scary. The fact that your lungs can explode just because you might not exhale during your ascent is insane.

@bscutajar

6 ай бұрын

You'd not be able to keep the air in, the failure point is your tongue or throat not your lungs, so you'd just be forced to exhale.

@reciprocating_popcorn_blade

5 ай бұрын

@@bscutajar No, the failure point is the alveoli in your lungs. Very easy to damage, they'll rupture much sooner than your diaphragm gives way. Think about it, if your diaphragm was the weak point, you'd just exhale on the way up and it wouldn't be very dangerous. Part of scuba diving training is learning to always be exhaling just a little bit whenever you're not taking in air. ALWAYS. Trust me, when I was getting certified, I forgot after taking a break and floated up about 3 feet and my lungs _hurt_ for days after

@axe4770

5 ай бұрын

I heard that deep diver has to hold themselves at certain depth for a set of times before raising out of the water to avoid sudden un-gas of the dissolved oxygen and nitrogen in their blood that will surely be very painful and lethal as well.

@flip117100

4 ай бұрын

@@bscutajar False. Pulmonary barotrauma(over expansion of the lungs) is very real and very dangerous risk in any compressed gas dive.

@AidanJDupuy

4 ай бұрын

@@axe4770Not even deep divers. You can build up dangerous gas levels from even like 60 feet of water. It depends on how long you are underwater at different levels of depth. Learning how to safely ascend from diving is one of the most important parts of your training. Also a reason why dive computers are an absolute lifesaver

I was a lifeguard in the early 90s. I tried to clean the deep end of the pool using this trick. It was amazing how quickly it became near-impossible to breathe. As soon as I noticed it, I realized what I had overlooked.

I tried that once at my friend's above-ground pool. I was totally taken aback that I couldn't breathe through a plastic tube only a few feet below the surface. It was then when I realized why it took so long to develop the self contained underwater breathing apparatus, SCUBA gear.

@lucasthech

11 ай бұрын

Now I know what SCUBA means, thanks!

@colorado841

11 ай бұрын

I didn't notice since he didn't capitalized it.

@RealMTBAddict

11 ай бұрын

​@@lucasthechThat should be common knowledge

@azerty.

11 ай бұрын

@@RealMTBAddictDon’t shame them for not knowing, I’m sure there was a time when you didn’t know that.

@matchrocket1702

11 ай бұрын

@@colorado841 My bad, sorry.

Not only is the water pressing on your lungs, it appears that your hose was actually collapsing under the pressure, which would make it impossible to suck air through it regardless.

@OkSear

11 ай бұрын

True

@hayd7371

10 ай бұрын

Yes I can't believe they completely overlooked this. They should have used a vacuum hose

@syedabdulfazal1679

10 ай бұрын

Yess

@PeterMilanovski

10 ай бұрын

That's exactly what I saw too! I kept thinking, how come I'm not seeing any air being exhaled? Are they trying to exhale back into the hose that's got kinks in it?

@donsancho6690

10 ай бұрын

The rubbery nature and unnecessary length of the hose definitely contributed to the issue

Thanks for getting right to the point, I really appreciate content like that.

Excellent! I’m an engineer and I can’t think of another video or text that beautifully explains this concept…kudos to doing and showing

When I was young at college, I swam in under water show and underwater gardener. We used hoses with 50lbs of pressure and tips that when pressed sideways would release pressure. Because there was no regulator you had to learn how much air to allow in and exhale. One of the hardest thing to learn was to be able to sneeze underwater. If your body needed to sneeze and you didn't, you could not inhale more air. The things I learned how to do underwater, especially without tanks, is incredible.

@huyked

11 ай бұрын

Whoa. I hadn't ever considered about sneezing underwater. I don't ever recall having the sensation. Interesting.

@kuromusse9604

11 ай бұрын

​@@huykedyeah fr I think I'd will through it if not fuck me 😂

@savage___stomp

11 ай бұрын

For me, I recall a slight/quick (but sharp) inhale at the exact moment RIGHT BEFORE the actual sneeze… Maybe it's not the same for other people… But if it is, then wouldn't you end up choking on the water that your body is trying to inhale in order to sneeze??? 🤔 (Sorry if what I'm saying doesn't make a lot of sense.😅)

@davidscott5903

11 ай бұрын

@@savage___stomp It makes perfect sense. You just have to prevent that by controlling it. I do best when trying to limit my sneezes by breathing out my air, then my sneezes are mostly just lung convulsions without moving much air.

@kenwelch198

11 ай бұрын

The mermaids at wiki wachi here in Florida have to learn to breathe with a underwater hose. They train for months before being allowed to do the show.

And remember, divers usually dive with 3000psi of air in their tanks. The first stage regulator reduces this pressure to the ambient pressure dynamically to adjust for water depth, and the second stage of the regulator, that goes into your mouth, is just strong enough that your lungs creating any amount of vacuum overcomes the diaphragm allowing air to flow into your mouth and then when you exhale it closes the diaphragm. But it takes that to breath under the pressure of water below a few feet.

@KyleT1990

11 ай бұрын

This answers the question I had. I was confused about how divers can use SCUBA gear if their lungs aren’t able to inhale.

@curtisreynolds7375

11 ай бұрын

@@KyleT1990 Glad I could shed light on that for you.

@HarmanRobotics

11 ай бұрын

The first stage of the regulator regulates to about 150 psi above ambient, the second stage regulates to ambient. I used to service and repair SCUBA equipment in the '90s, not sure of the exact numbers but they're close.

@shane727

10 ай бұрын

Thanks for this, I was wondering how scuba divers can breathe

@Stephanthecuteblondie2567

10 ай бұрын

​@@HighlanderNorth1Thanks, we aren't interested in your scam scheme and we actually want to live when we go under water

Thank you for recording and posting this educational video.

I haven't been swimming in a long time but man this video brings back all the fears I have associated with swimming, your ear getting blocked, loads of water getting up your nose, trying to see underwater without goggles, accidentally getting water in your mouth. Not even cameras are safe from the horrors of urine infested swimming pools.

Can confirm: During scuba diving, no-breath-holding is one of the most basic safety rules. Putting aside deco diving, recreational divers ascend slowly in order to avoid the air-expansion problem that you mentioned ... and, should the 'oh, shit' case occur where a bouyant ascent is required, we're trained to exhale continuously.

@zacharydefeciani7890

11 ай бұрын

Wait but how is inhaling from the tank different? Is it because it's pressurized?

@halfsourlizard9319

11 ай бұрын

@@zacharydefeciani7890 Yes, the tank is at higher pressure than the water and is reduced by the regulators in two stages. So, pressure of air inside lungs = pressure of water pushing from outside.

@zacharydefeciani7890

11 ай бұрын

@halfsourlizard9319 I wrote this and then he started talking about the compressor so I had a feeling that was why

@clairecelestin8437

11 ай бұрын

Confirm x2. For one of my PADI certs, we practiced one of those ascents where you blow bubbles and swim to the surface. Your intuition looking at the distance is that it's a long way to swim on a single breath of air, but that's the thing... It isn't really a "single" breath. As the air expands, the bubbles just keep coming, and it's easy to go that far with a constant exhale. Very weird experience. It's like having a magician pull an infinite scarf out of your mouth.

@halfsourlizard9319

11 ай бұрын

@@clairecelestin8437 Yeah, I knew that's what ought to happen in theory, but it was still bonkers to exhale and exhale and exhale and still have air.

The compressor part is like what you go through with a free-flowing regulator in scuba diving. The air is "free-flowing" through the second stage so you almost "sip" the air out of the regulator with very short breaths. It's an interesting feeling

An interesting story related to this. There was a prisoner who attempted to escape through the water from whatever prison it was. He made a helmet out of a football and used a long hose to breath that he tied a float to. He filled his pants with rocks so he could walk on the bottom but hadn't considered that the air was breathing at that depth was is own air he just exhaled and he asphyxiated.

@best0616

11 ай бұрын

Did he die then ?

@babyboo600

11 ай бұрын

source: trust me bro

@sonnieandjacob

11 ай бұрын

@@best0616 his body was eventually recovered yes. This happened many years ago and I dont even remember how I heard about it but yes he did die. They think by the time he started passing out he couldnt drop his ballast in time and surface.

@vctrsigma

11 ай бұрын

Guy should have used two hoses.

@sonnieandjacob

11 ай бұрын

@@babyboo600 I have none. I think at this point I heard that story 15 years ago on the radio I think. I honestly would love to know if i am remembering that right or not

This is the purpose of the regulator in modern SCUBA equipment. It reduces the air pressure from the 3,000 PSI in the cylinder to exactly match the water pressure at whatever depth you are at at that point in time. If the air pressure going into your lungs is equal to the water pressure pushing on your lungs, breathing just feels normal. It's really quite amazing technology.

@thecoolereraserii6082

9 ай бұрын

Crazy... You inhale more air per air and don't even realize

@Eye_Of_Odin978

7 ай бұрын

@@thecoolereraserii6082 Sometimes it's regular air. Sometimes it's a gas mixture. Depends on how deep you are.

@PIndyJones

7 ай бұрын

Interesting. Thanks for explaining that. I wish this dummy would have put that info in the slide also

@JUNIsLuke

7 ай бұрын

I love watching the dive talk channel and never learnt that!! Does the lower air pressure affect the amount of air you inhale/absorb?

@markopolic9964

7 ай бұрын

@@JUNIsLuke The volume of your max inhale doesnt change( it's fixed by lungs/ribs size). The deeper you go, the more pressure there is, meaning for the same volume you'll need more and more air, therefore the deeper you dive the faster you will go through a tank. Naturally that does come with side effects( like decompression sickness, gas narcosis, etc), but smart people invented ways to diminish them( as much as possible).

Fascinating! I never considered these matters of water pressure on the lungs!

Great video! Straight to the point, clear, and interesting!

I tried this 50 years ago in a farm pond with a garden hose. The conclusion that me and my friends came to was that our lungs had less capacity than the length of hose so we were breathing our own air ( some have noted this below) . We never thought of the pressure difference since the pond might have been 5 feet at the most.

@headhunter1945

10 ай бұрын

you would only use the hose for intake and exhale through your nose into the water. but the reason this won't work anyway is because the pressure of the water presses the hose closed. You need something like a hollow pipe that will stay open.

@markopolic9964

7 ай бұрын

@@headhunter1945 You can find videos of people trying that with a hollow pipe, still doesnt work deeper than 1-2 feet because of the pressure needed to inhale.

@jimaylan6140

5 ай бұрын

@@markopolic9964 What if you brought an upside down bucket with you with a weight attached. You could then use that as an air source because it would be compressed at the same pressure, right?

@perkypears

24 күн бұрын

@@jimaylan6140 the air's pressure doesn't matter, it's your body's pressure. the water is crushing your lungs closed and they're not strong enough to expand. the way scuba suits work is the air tank actually senses how much water pressure there is and forces air into your lungs with that much extra pressure, so it forces your lungs out from the inside. that's why as he mentions divers must exhale before resurfacing because all of that pressure will be in their lungs and without the water continuing to press it in then it'll explode

Another problem you experiences was that the tube got kinked and compressed. So even if you had super strong diaphragms and could fight against the surrounding water pressure, you'd still get no air through your tube because it was essentially held shut and any vacuum pulled on it would just collapse it further. You should have used a solid pipe to try with.

@randomusername509

11 ай бұрын

This is what I was thinking of too - what about a stainless still tube or smth

@alphamegaman8847

11 ай бұрын

Yep, in the movies they usually used some sort of Reed/Bamboo. Rigid wall, Bigger the Bore the better. Still not going to do much though to help below a few feet. Your mileage may vary! 😁 Mike in San Diego. 🌞🎸🚀🖖

@diox8tony

11 ай бұрын

yep, I'll believe its a pressure issue if they use a pipe or supported tube.

@GTrainRx7

11 ай бұрын

Came here to say this :)

@theeraphatsunthornwit6266

11 ай бұрын

I bet on this theory😂

W video love how informative it is keep up the good work!!

@2KHunter

23 күн бұрын

JESUS AND GOD LOVES EVERYONE SO MUCH TURN TO THEM BEFORE ITS TO LATE

I appreciate the emphasis on safety and talking about the potential risks

Added disclaimer for the air compressor you are breathing un dryed air, pretty sure u can get pneumonia if you do it for extended time. Also risk of inhaling rust and oil

@vincentturnt6635

18 күн бұрын

Another disclaimer: the thumbnail is not a reference to George Floyd

@YEs69th420

15 күн бұрын

@@vincentturnt6635 The fuck kind of comment is this

I remember as a kid on holiday, swimming in the hotel pool with my snorkel, and I tried to fully submerge my head while the snorkel was still sticking out of the water, using the pool ladder to hold me under. As soon as I did it I realised I couldn’t breath, and now 20 years later, I have my answer.

This is probably the most dangerous thing ive seen you test! I was terrified the entire time! Amazing video!

@codyking4848

Ай бұрын

Never been outside or what?

Wow, thanks for posting this. I'm 31 and have never even thought about how physics would apply itself in this situation. Now I know that I can't rely on a tube of air, and can't rely on surfacing with lungs full of pressurized air.

Interesting how the pressure of the water makes breathing impossible. I can see why this is an issue. Creating scuba diving was a challenge on its own.

I double a snorkel length once and was surprised by how difficult it was to breath just an extra 6 inches under water.

@neutronenstern.

11 ай бұрын

dont do that, except if it has a exhale valve. Cause else you inhale the air, that you just exhaled and die.

@wanderer.antonio

11 ай бұрын

@@neutronenstern. Exhale valve, that's genius, now I can safely try this at home!

@Ittiz

11 ай бұрын

@@neutronenstern. the pipe was fairly narrow. I didn't try it for long.

@davidscott5903

11 ай бұрын

@@neutronenstern. It has to be a really wide or long tube to hold that much air, unless you are breathing really shallow breaths.

@ntray3729

11 ай бұрын

@@neutronenstern. it should work aswell if you exhale through your nose instead of back into the tube right?

So interesting! I didn’t expect this outcome!

it's not just your chest being compressed. the pressure at the depth is greater than at surface, so you are trying to move air from an area of low pressure to an area of high pressure within the tube itself. That's why the tube you can see is collapsing under the pressure when you try to breath in, you managed to inhale the little bit that is in the bottom length of the tube but no air from surface would be brought in to replace that. If you take the air filled tube and seal the top end, then bring the whole thing horizontally to your depth and unseal the end, now the pressure on the whole length of the tube is equal. you can now breath in that air in the tube at that depth. same if you get a large bowl upside down and bring it down to the depth and only stick your head in there, you can breath in the air trapped in that bowl even though your chest remains in water with same pressure.

I discovered this as a child in the 1980's in my own backyard pool. Cool you're doing this as an adult on youtube like 30+ years later. Hardly groundbreaking though.

Thanks for noting that the compressed air in your lungs will expand as you surface. One of the first rules that I learned during YMCA scuba lessons in 1972 when I was 15 was "Don't stop breathing". Though I haven't been an active diver for many years, I'll always remember that rule.

@Parmetheus

11 ай бұрын

Good advice for anyone, really 👍

@rickkwitkoski1976

11 ай бұрын

@@Parmetheus It's actually... Never HOLD Your Breath!

@thomasfplm

10 ай бұрын

1st rule: never dive alone 2nd rule: never hold your breath

@majorbuzz

10 ай бұрын

@@thomasfplm That's what I learned in the YMCA program.

@thomasfplm

10 ай бұрын

@@majorbuzz, and I learned from PADI.

1:52 I think there is a slight mistake. 10 feet is about 3m . Pressure rises about one bar every 10m. So at 3 meters he should feel 0.3bar on his chest. 0.3 bars = 43.5 psi, not 435psi.

@andrewt9204

11 ай бұрын

4.33 One PSI is 2.31ft of water column.

@Sixta16

11 ай бұрын

0.3 bar is 4.35PSI

@yaykruser

11 ай бұрын

@@Sixta16 Ur right,im an idiot too,lol.

@deepanshu_choudhary_

11 ай бұрын

@@yaykruser don't take it seriously man you just wanted to politely propose a correction.. you weren't in the wrong. Have a great day.

@rich7331

11 ай бұрын

​@yaykruser still better than the clown making this video 😂

At first I thought "what if you use a tube with enforced walls that wouldn't collapse" but then you showed that it's impossible to blow air to that depth and I understood that it is a pure pressure problem of your lungs. Learned a bit. Thanks.

To get SCUBA certified you have to do an ascent from 30 feet (I think?) without your tank. Just take a breath, drop the tank, and go up. It's a bizarre feeling blowing out, and out, and out, and out for the entire ascent. You never run out of air.

I was able to breathe underwater about 3-4 feet down in my grandparents’ pool as a child. I used about a 1/2 inch diameter flexible hose from an old hand pump, but without the pump attached. It was laborious, but I was able to breathe while laying on the bottom, and I could stay down there for essentially as long as I wanted. I’m sure that some degree of rebreathing my own CO2 did occur, but I never felt that I didn’t have enough air. It simply took considerably more effort than it does to breathe on the surface.

@Rompler_Rocco

11 ай бұрын

Very impressive! I was able to do the same at 8-9ft, but that apparently "doesn't qualify" due to my "highly suspicious green blood and metal skeleton"😒

@Games_and_Music

11 ай бұрын

I did that with a plastic PVC pipe, we had a pool at a holiday home and i laid flat on the bottom and basically stayed under until i got bored of it. I was kinda surprised that they only used the flimsy tube and not something more solid to compare to, or at least included the vacuum in the tube in the explanation. He didn't need to show the bottle and the bag, he could've just mentioned how the tube clogged up because of the pressure. But yeah, he now made it sound as if it's not possible at all to breathe underwater.

@charlestannehill7537

11 ай бұрын

​@@Games_and_Musicbecause he doesn't know what he's talking about. And people listen to this. Science lab my ass. I'm a certified commercial diver. Check my comment in comment section. I lay out how he's wrong.

@brendanberry7403

11 ай бұрын

You can see multiple times how the tube is collapsed down near his mouth. Of course you can’t breathe in lol.

@charlestannehill7537

11 ай бұрын

@@brendanberry7403 😆😄😆😅😂🤣 it amazes me how he didn't catch that. Seems so simple and easy to notice.

I think there's a calc error at 1:55 ....433 psi is 30 atmospheres. which is around 900 feet deep. Since mercury has a density of 12x water: 30 inches of Hg ( a standard weather forecast) --> 30 feet of water.

@frostbitten41

11 ай бұрын

Another conversion they taught us in diving class was 1x atmospheric pressure (14.7 psi) for every 10 meters, in line with what you both mentioned.

@beardy_welder

11 ай бұрын

Yeah I came here to say the same thing, you'd be hard pushed to survive 433 psi water pressure

@gorkyd7912

11 ай бұрын

@@beardy_welder You'd be hard pressed at 433 psi....

@beardy_welder

11 ай бұрын

@@gorkyd7912 I didn't even realise I'd said it that way but now you mention it 😂

Not all hoses are made equal. Try this with a double helix hose. They are resident to compression.

I knew it wasn't possible but had no idea it was at such a shallow depth.

My brother and I did this with an air compressor in our pool and we were able to stay down, but when we came up we realized that compressor air has a oily taste and smell that is not the best to be breathing. We only did it that time and never again.

@matchrocket1702

11 ай бұрын

You can get a filter for that. They are used for air brush painting. I don't know how good or suitable it would be for breathing, however.

@Teth47

11 ай бұрын

@@matchrocket1702 Yeah do not do that. Airbrush clean and lung clean are different worlds. It isn't even so much the quantity of contaminant as it is the type.

@matchrocket1702

11 ай бұрын

@@Teth47 Good advice.

@euclidallglorytotheloglady5500

11 ай бұрын

I highly recommend never doing that again. You could have easily caused major problems and even killed yourself. It isn't hard to give yourself a embolism with what you were doing. I know it's fun to find ways to stay under water, but it's also very dangerous.

@ronblack7870

11 ай бұрын

compressors for breathing air need to be oil free or they need a scrubbing system plus a carbon monoxide detector. oiled compressors can actually produce carbon monoxide which will kill you.

Even though you say not to do it, it's really cool that you explain HOW to do it safely, because inevitably, someone is going to see this, and is going to do it anyway.

@jackiec498

11 ай бұрын

I'm doing it right now....the main issue so far is texting under water. Its hard.

@weppwebb2885

11 ай бұрын

@@jackiec498 Yeah, I can imagine. My touch sreen never works when I'm underwater. Might try a laptop next time.

@rey_nemaattori

10 ай бұрын

@@weppwebb2885 I'm sure you would need to bring ur PC to the bottom of the pool for this...

@TheNone724

10 ай бұрын

Well you need to take scuba diving training and then you can use real safe equipment to do diving

@Chimera6297

10 ай бұрын

@@rey_nemaattori I'm not sure about the logistics of taking electronics underwater so I'm just gonna try this with a toaster instead

I don't know why I am randomly holding my breath whenever they go under water😅

@Dex1653

19 күн бұрын

Yea me too 😂

I learnt a lot watching this video and reading through the comments. Good stuff!

A perfect entertaining experimental scientific video for summer time, love it keep it up guys ❤

Also remember that when you are trying to breathe through a tube that goes to the surface, your effective blood pressure in the inner surfaces of your lungs is going to be the sum of your normal blood pressure and the difference between the water pressure and atmospheric pressure. So you could potentially exceed the rating of the blood vessels in your lungs.

@intelligencehunter42

10 ай бұрын

😂 man said rating of vessels.. funny but good info

Man, that pool and that view.

4:00 1st safety rule of scuba diving: never dive alone. 2nd safety rule of scuba diving: never hold your breath. And an interesting fact is that holding your breath at low depth is more dangerous than if you are, deeper, because the variation in volume is smaller for the same variation of depth the deeper you are. At 10m you have twice the atmospheric pressure, if you go up 10m the volume of air doubles. At 40m you are at 5 time the atmospheric pressure, if you go up 10m it will go to 4 times, so the change in volume is 20%. (to be clear, it is in case you fill your lungs at the bottom, if you fill it at the surface, the volume will reduce and go back to the original volume)

@svr5423

2 ай бұрын

I dive alone quite a lot. Needs additional training and equipment. I prefer it to going with random buddies - seen too much BS. The risk of them being a liability rather than a help is there.

@thomasfplm

2 ай бұрын

@@svr5423, ideally, you should have someone who you know and have enough training. I do recreational diving, not professional, but even among professionals I still hear the first rule. The second one I heard professional underwater photographers say they break to get some pictures.

@svr5423

2 ай бұрын

@@thomasfplm Professional divers tend to go in teams, same with technical diving. But they are trained for this and the requirements are much higher than for recreational diving. Under PADI, you can for example do the Self Reliant Diver course. But yeah, standard is with a buddy and there should be a reason why someone would deviate.

@thomasfplm

2 ай бұрын

@@svr5423, that's true. Also, in this case, the main point was the second rule about not holding your breath, that is more relevant to the subject of the video.

After you explained the air compression thing it finally made sense to me how divers work! Thank you!

Glad to see you correct the PSI. A good comparison to help people understand the pressure is every ~33 feet is equal to 1 atmosphere. So you go from 1 to 2 atmospheres in just 33 feet. And since that is doubling the pressure you reduce the volume of the same amount of air in half. In 10 feet you are still adding about 1/3 of an atmosphere of pressure. I would need to pull out a calculator to calculate the change in volume but it is more then you would think.

@rogerrabbit80

11 ай бұрын

4/3 the pressure (1 and 1/3 atmospheres) would mean 3/4 the volume.

@arthurbrown8744

11 ай бұрын

Ty so same loss of volume from 0 - 10 feet as 10 - 30. As I recall in from my scuba training in shallow water even a couple of feet can cause your lungs to burst if you take a breath of compressed air hold it then rise in the water column. This is why one of the rules others have mentioned is you are always breathing in or out.

Man’s actually chose the worst possible crinkled tubing for this instead of a rigid tube and straightening it out as much as possible.

This is basically the science behind Scuba Diving at Shallow Depths

This is useful knowledge for someone who likes to swim

this question is kinda simple but quite interesting

@CODA96

16 күн бұрын

Videos like this one made early youtube. Could have also been from 2009 in some kind of mythbusters episode

such a simple experiment but really solidifies these concepts. thanks. I wouldn't have used such a flimsy hose though, I'd try it again with a garden hose or 10 ft of plastic pipe.

The last thing about not surfacing with the compressed air was really something new to me!

try with a pipe ! the hose seemed to be kinda kinked in many places !

@andy.bernard

11 ай бұрын

Still wouldn't work with all the pressure on your body.

2:56 this makes me want to watch an hour long compilation of pioneers looking like weirdos while testing new tech

What gets me is free diving. Holding one's breath at -100' or more is just wild to me

As related experience, I did kayaking from my teens in the 70s, still do occasionally. When I was younger, I toyed with the idea of putting a snorkel inside the kayak, so that after capsize, I could breathe air from inside the kayak & just chill, looking at the under water world. Had a bit of an idea about spear fishing this way. Well, I never did the spear fishing thing but I did try the snorkel idea some. I found that after capsize, breathing through the snorkel was initially very difficult. However, after a short time (30sec or so), it got easy & sustainable. I assume there was a pressure equalisation issue going on with water or air leaking through the spray skirt, which was meant to keep the water out of the boat. However, to this day I am not sure just exactly what was happening with the pressure or why. Might be an interesting thing to investigate further.

When surfacing after a dive you'll usually make a "safety stop" to let the pressure equalize as you ascend. Cool video I didn't even think about how deep you could snorkel.

@thomasfplm

10 ай бұрын

Thats mostly to reduce nitrogen in the blood, not related to the volume of air in the lungs. Two problems related to breathing in increased pressure, but different ones.

Wow I never thought much about breathing underwater before. I definitely wouldn't have known about resurfacing while holding a breath in.

@rey_nemaattori

10 ай бұрын

That's only an issue if you have breathed in at depth(and thus: under pressure). If you hold breath and dive, the air wouldn't rip your lungs apart. Since compresser diving isn't a regular thing, this generally only happend when SCUBA-diving, and they'll train you ad ifinitum about not holding your breath while ascending.

perfect timing for this video

I came to this video having no idea about the why "it doesn't work". But in less than a minute, with merely the sentence about the elephant, I understood it all. "It felt like an elephant was sitting on my chest". I immediately realized that to expand your lungs with the outside air, it'd be the same as lifting every single water molecule above you, merely with the strength of your own lungs and chest expanding capacity. And what's worse, this also implies you'd have even greater difficulty on an area with even more water. It's like the water is constantly trying to implode you.

I know its true because I tried the same thing, however it looks like your tube has a kink in it that kind of spoils the proof.

Awesome experiment as always, but I think there is another variable here; I think the air hose itself is quite soft that can be easily crushed and closed by the surrounding pressure stopping air from entering and coming out I think if you use a harder hose you can go deeper and breathe easy may be to a meter or 2 or even 3 meters I don't think pressure on lungs are that big in 2 or 3 meters depth in a pool Definitely pressure will increase and will prevent the lungs to expand, but not on those shallow depths

@markopolic9964

7 ай бұрын

There're already videos of people trying that with a pipe online, they couldn't go deeper than 1 or 2 feet.. At 1 meter, the added pressure is about +0.1 bar[ 1bar being the pressure of atmosphere at 0m]. According to ncbi.nlm.nih maximum negative pressure humans are able to make is about -0.1 bar, meaning you'd have to try your hardest just to be the same as your surroundings on 1m, and you'd need at least a bit more to start inhaling.

As someone with scuba diving experience, I was taught that the reason those long reeds people use in stealth missions to breath underwater don't work as snorkels is because of the lack of pressurized air. Your lungs don't have the suction power under that depth due to the water pressure on your body. A very short reed might work, but your head won't be submerged very deep. That's why snorkels are no longer than 18 inches.

I one time needed to find a leak in a pool liner , so i hooked up a regulator to a compressor , and used a aquarium hose ( 50') connecting a snorkel to the regulator at 2 psi to stay under water while looking .

For some reason I'm holding my breath while they were underwater

433 psi? I think you mean 4.33 PSI

It's really cool to see the dolphins. Thanks for all the nice videos.

Wow, i literally never new this. I'm always learning something new. Who would have thought this breathing under water threw a tube thing was a myth?

It's quite possible to get an embolism in only 3ft of water after breathing compressed air.

@yannicfreson2974

11 ай бұрын

still, better include the warning before people go test this for themselves in deeper waters without proper knowledge ;p

@diox8tony

11 ай бұрын

@@yannicfreson2974 the person above you is suggest there should be MORE WARNINGS on this video...because its more dangerous than shown.

@yannicfreson2974

11 ай бұрын

@@diox8tony i misread that as "impossible", my bad xd

Course it shows me this the day people get imploded on a sub

Very clear to see that the hose you are using is pinching itself off and causing restrictions

if you think about it, it really sounds scary when you hear "compressed air expands in your lungs after resurfacing"

I think the problem isnt with the water pressure acting on your lungs, but on the plastic tube which causes it to buckle and close off, i would redo the experiment with a stronger, non flexible tube.

@charlestannehill7537

11 ай бұрын

You're on the right track. Certified commercial diver here. He's wrong. I laid out why he was wrong in the main comment section.

@jmodified

11 ай бұрын

Based on doing this as a teenager, breathing at 2 1/2 feet down (mouth to surface, lying face up) through a rigid tube is brutal. You'll only be able to take a few dozen shallow breaths before your diaphragm tires out. You need to keep your lungs near the point of maximum inhalation strength, which is somewhere around the mid range, so you're straining hard to keep from exhaling too much then really hard to inhale a bit. I think his "3 to 4 feet before we couldn't take a breath at all" estimate is high.

@charlestannehill7537

11 ай бұрын

@@jmodified that's because you're trying to intake and exhaust through a single tube with no one way valves. Maybe I should make a KZread video showing why he's wrong.

@jmodified

11 ай бұрын

@@charlestannehill7537 Sure, with a check valve you can inhale at somewhat lower pressure because you can relax between inhalations. And, you could attain much lower pressures by repeatedly using mouth suction, though I'm not sure if you could get air in fast enough that way or keep it up for very long. Mouth suction is much stronger than lung suction, maxing out at about -7 psi, so the limit would be 15 feet or so. But this video was about breathing through a tube (no valves), so how does that make him wrong?

@charlestannehill7537

11 ай бұрын

@@jmodified he was referring to as why a snorkel with a longer tube wouldn't work. And he's wrong, plain and simple. Who says a snorkel can't have a one way intake valve? And a one way vent valve? Unified into a single mouth piece? While being ridgid with a float ball attached to have vertical buoyancy? Anyways, this was very poor half assed attempt at busting this “myth". Which he failed and got wrong. He didn't understand the principal of lungs only being able to pull and push so far. Nothing to do with pressure. If air is only going in one direction, there's no carbon dioxide to rebreathe in. And your lungs have to do no work pushing it out. So it's not as stressful as you might think. At 33 feet, you have two atmospheres pressure. And every 33 feet after that. Even at that depth (33 feet) with the proper setup to what I'm talking about, it would feel like being able to take half breaths. Basically your lungs strength to intake air. And not everyone is the same. You learn that quickly in dive school. He could've asked ANY submariner, commercial diver (like me) or deep sea rescue team. But he didn't. He took that jank ass tubing without understanding the core principles. Now that I know he's wrong on this, I wonder how many other things he's wrong on. I will not build it, nor do I care to build it. I can slap on a Kirby morgan 27 and weight belt and walk on the bottom. And I live in Oahu. So, yeah....

Что если к трубке небольшой насос подключен, плавающий на поверхности *понятно

Fun fact: The pressure in PSI is the weight of the column of water from the surface to your depth. About 33 feet is 396 inches, and that's where the water pressure is 14.7 psi, or 1 atmosphere. About 396 cubic inches of water weighs 14.7 lbs.

Respect for the people that open their eyes with out goggles

@prakharchaurasiya8107

19 күн бұрын

It's one of those things that feel difficult, until you do it and then it's just so easy.

the tube is flattening as wellat ~ 3-4 feet

anyone acquainted with the principles of hydrostatics will be unsurprised. 🤣👍

I would say its the warterpresure that helps you breath out or should we say squizes the air out of your body As you said There is a reason why air was pumped down to divers and why airtanks are pressurized (beside to store more) You could add a manual pump for the diver

I’m just at 0:48 and I noticed that the tube is collapsing under pressure …. but just assuming it’s very hard to expand the lungs trying to contrast the water pressure even with a “solid” tube… now I finish to watch the video. edit: just saw also the pinned comment 🤣 the video was super clear explaining!! as usual! every video is just art for me!!! great job!!!

Does tube size matter?

@officiallychelz6508

9 күн бұрын

I don’t really think so because you’ll still be “pushing” against the hundred/thousand pounds of water again

I free dive with a garden hose connected to a floatie all the time. your head can confortable be 20 to 30 cm deep. 40 cm still possible to breath but much harder. Any deeper and it's like the air just gets sucked out of your lungs. But you can have your head 30 cm deep and relax. Then pinch the tube and dive. I find it much more relaxing then a snorkel.

Years ago, when I did pool tech work, I wanted to try this. I never got around to doing it, but a more experienced coworker said it was highly unlikely I could suck air down to a deep level just from my own body power.

How much deeper could you go with pure oxygen instead of 80% nitrogen?

@truemori6700

11 ай бұрын

like 0 feet

@douglasharley2440

11 ай бұрын

the problem is that one's diaphragm cannot overcome the pressure at-depth; gas mix has no effect.

@AndrewNoronha-cb2gy

11 ай бұрын

You could go 80% deeper ofc😂

@westonding8953

11 ай бұрын

You would damage your lungs if you breathe pure oxygen.

@n5sdm

11 ай бұрын

12 feet. Any deeper and it becomes toxic. (Assuming 14.7psi atmosphere pressure at the surface of the water). I was able to pull air at 3 feet, but just barely. Any deeper and the water pressure just pushed too hard.

I feel that it's important to exclude the hypothesis that the tube itself collapsed, and that was blocking the flow of air. We can see that the tube has in fact partially collapsed. You also could make the tube have a much smaller internal diameter, whilst having a thick wall. This would both mean it was more resistant to collapse, and that there is less additional air volume to move at each breath.

Only 0:50 in. Growing up on a lake and cobbling together longer snorkels, im going to say the limit is about 3ft under.

no way, an actual science video where i knew the answer before it ended. thank you PADI

0:14 I will attempt

It looks like the water pressure was compressing the tube itself, could you perhaps have had a deeper limit if the tube was rigid? Cool video.

@saitama2379

11 ай бұрын

Tube rigidity doesn't matter. At 10 ft depth you're essentially trying to breathe with 300 Kg weight on your chest.

@Kolbein837

11 ай бұрын

@@saitama2379 Why doesn't it apply to divers with a tank?

@jmodified

11 ай бұрын

@@Kolbein837 They use a regulator which adjusts the pressure to that of the surrounding water.

Very good demonstration of the physics involved.

You can only breath if you are partially submerged with your back out of the water, even with the head out you can feel the struggle but eventually your lungs get used to it and can swim like a champ. When you are fully submerged a few feet underwater you're done breathing completely, not only your lungs can't draw air but there's actually a vacuum effect drawing your lungs' air out of the tube due to air pressure differential of your lungs being squished by the water pressure vs the atmospheric pressure which is lower. To breath underwater you need compressed air at a pressure higher than what is in the depth you are breathing at so it can inflate your lungs like a balloon does on air.

Your tube appears to be effected by the pressure of the water as well, would a rigid tube help you get a little lower?

I forgot to heed the warning not to try this, and now I am at the bottom of the pool with no air. Luckily, I have my waterproof laptop here, with underwater wifi, so I can warn others not to try the same thing.

I remember long ago there was a product that would reach the bottom of a pool (10 feet). It used leg power to draw air down and had an exhaust valve so you wouldn't rebreathe exhaled air.

I would appreciate if you could also mention units that people outside USA can understand.

i'm sure you didn't know so i'm here to tell you. it's illegal to swim with dolphins like that here in hawai'i. also I made this same video like 2 weeks ago lol

@bobjames4560

11 ай бұрын

Hey just realised I saw DIVE TALK React to that video recently!

@deltalima6703

11 ай бұрын

They just did a flawless one on this topic with britanny and some guy. Worth checking out.

@thomgizziz

9 ай бұрын

They aren't really swimming with them, the dolphins just happen to be there. Something showing up to where you are doesn't make you end up doing something illegal... get that BS out of here.

@bobjames4560

9 ай бұрын

@@thomgizziz “The National Oceanic and Atmospheric Administration rule under the Marine Mammal Protection Act prohibits swimming with or getting within 50 yards of a wild spinner dolphin, so if you want to get very close to a dolphin on Hawaiʻi your only legal option is to see (and swim with) captive dolphins.” This is sounding like it is illegal to be swim within 50 yards of a dolphin in hawaii. Whether you approached them or they approached you.

@freedustin

8 ай бұрын

@@bobjames4560 So...its my word vs the dolphin so I win by default of dolphin not being able to give its side of the story.