what happens to the lungs of a freediver during a deep dive, boyle´s law in action
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- Опубликовано: 25 авг 2024
- experiment with a liquid meter, open and turned upside down. it plunged to -55 m with 1 liter of air inside. the water pressure push up the air, compresing it to 154 ml at 55 m depth. the air expands while climb back up to 1 liter.
glad you all liked and understood this expermient, i would liked to bring it to -70 m at least, but i didn´t want to risk my gopro (limited to -60 m) Saludos desde Canarias, keep trainning
lel heard what he said? he didnt want to risk his gopro.. his ... go ... pro... lel. i would die just thinking about diving 70 meters down... :D
I'm amazed he didn't decompress his ears
Guille valiente. PV= cte, le pongo este vídeo a mis alumnos de física.
You'd rupture your ear drums before reaching 10m, easily.
You MUST equalize.
When I go scuba diving, I usually equalize two or three times per meter I descend, because otherwise you'd start to feel it (uncomfortably).
For this guy, I'm guessing he was equalizing non stop the entire way down, since he was going so fast...
Some people have the ability to equalize without making maneuvers like valsalva or frenzel
What's more impressive is the way you casually did 55m dive
@The Fast Lane 55 nothing hard
Looks like a variable weight dive.
Dude went to 55m, then casually says he'd go to 70 m but his gopro can only handle 60m. lel
This is such a good video to demonstrate how this works! ITs crazy how quickly the air compresses in the first 10m
Wow. If I ever went diving (free or scuba) I'd probably have a panic attack and die lol
Cause you a loser yo
@@thelolcat100 Its practically same as going EVA in space. So it's understandable.
I loved how u have the vto voluntarily tube opening or btv maneuver wow. Beautiful. Liked and subscribed 😍
that makes it easy to understand the relation of pressure and volume...
Nice experiment...👍
Wow thx for sharing pretty crazy stuff had no idea about how that worked!
To help out anyone with fears Not many of us normal humans are freediving to 55m or 180 feet deep . My personal max is 16 meters I have never waited to go any deeper.
isnt thee a shark video about girls who died at 16meters lol
@@lazisawsome413 everyone can die anywere
One can hear the sound change with the increasing pressure.
And so can another
Am I the only one who feels a heavy weight on their chest when he reached the bottom kinda like we’re there holding our breath with him 😬😬😬😬😰
I think the lungs of the freediver collapse to a certain level, depending on the biomechanical resistance of his/her torax (skin, rib cage tension, muscle tension, blood pressure, etc, that offers the diver as natural barrier) and his own ability to resist the water pressure at that depth. The interphase water/air within the inverted canister is the smallest kind of resistance we can imagine in diving. If we added a wall (e.g. a flexible, impermeable membrane like that of a ballon as an interphase), depending on its hardeness and flexibility, the final airvolume at the same depth would be larger than in this experiment. The most extreme case would be, for example, a thick metal sphere full with 1 L of air at atmospheric pressure and hermetically closed. In this case, the air pressure/volume at 60 m would obviously still be 1 atm/1L. My point is, the lungs of the freediver are of intermediate "resistance" between the example shown in the video and the case of the metal sphere. Therefore, the air volume in the lungs of the freediver is not reduced to the same extent as the air in the canister. Although I do not know much about freediving technique, I am pretty sure they must try to keep the shape of their torax to avoid some kind of extreme lung squeeze.
You have posted a very interesting comment. The pressure is there at depth. The mathematics don't lie. As to the actual distortion and degree of compression of lung tissue or internal capacity reduction: until a diver will allow a camera and the necessary illumination into the chest cavity and one also into the lung itself and dive to depth, we will never know for sure. Stretch and elasticity of internal organs under pressure may surprise us. But I believe you are correct in that the sternum and ribs limit distortion. If you have not seen the amazing Filipino Free Diver here on YT ck. it out. ""Sea Bed Hunting on One Breath-Human Planet: Oceans, preview. BBC One"" this guy is lean muscle and bone, therefore negatively buoyant not needing weights.
Guys i am so confused, if we hold our breath and close our noses and we dive, will the volume in our lungs still decrease as we go deeper down into water?
Absolutely! But as much as the constitution of your thorax at the final depth allows. Every person would be slightly different. Diving is not an exact science. There is no direct air-water interphase in your body (except in your ears and sinuses), but an air-lung-pleura-ribcage-muscle-skin interphase, constituting the thorax, behaving like a close balloon. So, if the water pressure is high enough to overcome the natural resistance of your full-of-air thorax against compression, then that will be the final level of lung volume reduction.
That is why in scuba diving we used pressurized air, which is deliver by the mouth piece at a pressure a tiny bit higher that the pressure at depth, so you can be able to breath it in and overcome the outside pressure!!!! If a freediver were to try to breath at, e.g., 10-15 m dept from a long hose connected to the surface (1 atm), he would have trouble to fill his lungs, to fight the pressure at that depth with only 1 atm of air pressure (let alone the effort needed to aspirate trough such a long tube). I hope this explanations helps to clarify.
would you explain me this video?
Sure! There is 1 liter of air inside the inverted vessel in direct contact with the water. The deeper you go, the highest the hydrostatic pressure, or the weigh of the water on top of you, sort of saying. Air is obviously a gas, and it can compress under pressure (reduce its volume). Therefore, you can see how the volume of air inside the vessel reduces while the diver descends (-> higher pressure than in the beginning), because the water is "pressing" the air inside it. Similarly to what happens when you fill a siringe with air, close the nozzle and press the pestle! You can compress the air and reduce its volume by increasing the pressure. Hope the explanation helped.
Nice Frenzel technique!
If I smile hard, the tubes open and my ears equalize without blowing
good video, very like the way equalize
Going by the title of your video, it doesn't really show what happens to you lungs but what happens to the air in your lungs.
they shrink for what I suppose is vacuum effect? In apnea the respiratory muscles are still and unsued, the air gets compressed and the volume of it goes down as you can clearly see in the video, which would lead to the lungs themselves shrinking as well or else you'd have this massive empty space in your lungs that I'm pretty sure it doesn't make much sense from a physics perspective?
idk, just thought
And that's why Our Lord created bloodshifting: you can pressure gas, but you cannot pressure liquid, so our body (in order to protect them) shift blood into the lungs to keep them from squeezing.
God is great.
I rest my case.
good
...and a part of the gases dissolves in water with the increase of the ambiant pressure, that's the mechanics of the bends decease !!
Отлично и наглядно показано
jeez that's nearly as deep as i scuba dive!
dude just went 55 hands-free
nice
2:17 is that a shark on the left?
yes, reef shark
I am an IB student and also a two-star scuba diver I want to make this experiment. Can you tell me how did you set the volume to 1 liter? Please I really need that information.
In my opinion, you just sunk the cup into the water, turn it upside down and fill it with air from above the sea level. For that you need an air pump, a valve and a pipe. When you reach the desired volume in the cup, close the valve and done.
You should flip the "bucked" when you are that deep, would be cool I presume.
Hands free haha if only I could ....
it's actually very easy... Try to move your lower part of your teeth to the front and at the same time exhale a veeeeeeeeeeeeeeeeeery small amount of air from your nose...
very small...
You can try that on your couch with your nose closed (like you were wearing a mask)
Tao you haven't even worked out that most freedivers can't do that, you are lucky and have large unobstructed eustachion tubes.
Note : this by luck not skill, technique or perserverancet his probably also explains why you have so little gray matter in your head .....
@@kouvanos its impossible for 99 percent of people
how does he equalise? i never saw him pinching his nose on this 50 meter dive. whats going on?
many different ways of equalising
So
What do that mean?
If you will your lungs to 100% at a deep dive, then quickly go to the surface, the air in your lungs will expand and this will cause your lungs to explode because it can't tackle this expansion of volume
is there a lungover expansion sensor to detect any problems???
I don't think lung acts like a bag, it got bones and skin to protect it from pressed. The only volume changed in lung should be equal to the air utilized to add air pressure in cavities of middle ears, while diving downward. While escalating, this air should be release elsewhere or it expands and pops the ear drums. The above is my speculation with what I know, never tried it, anyone may pose your different opinion and explanation.
Incorrect. Submarines have massive steel hulls to resist pressure. The deepest dive of 820 feet is deeper than most military submarines. The reason humans can go so deep is that the body is mostly incompressible liquid. The lung cavity is fully compressed at these depths.
@@mariecornen2729 Liquid is compressible, just very little so compared to gas. At certain depth (probably more than 3 km/30 MPa/300 Bar) pressure will affect cell membranes stiffening them up and preventing oxygen/fuel to enter.
@@mariecornen2729 Also you are not correct. Skin and lungs material has elastisity and resist some pressure, not all pressure like submarine hull, but some amount of pressure is still resisted. If lungs rly compressed as much as this bucket air, lungs would suffer fatal damage due to alveoli squishing together and rupturing.
Wow there are some dumb ppl in the comment section. I have never scuba dived before and understand this. A 9 or 10 yr old should be able to understand this. It's showing pressure. Every 33 ft is 1 atmosphere of pressure if Im not mistaken. Meaning 33 ft deep it would be double the pressure of natural atmospheric weight of 60k ft of air. And at 66ft it would be 2 atmospheres and so on. So your body is squeezed. Water CAN force its way in your lungs if not careful. Not a clock, depth gauge.
Thankyou 4 making
probably Freznel technique
How this guy equalize?
I equalize like William Trubridge, without using hands.
Guiller Díaz is it the BTV method or something? it is something people can learn?
Azfar Yusof its really hard learning, some people have a natural gift for it. Some people work really hard for it. This guy is definitely pro! :).
Guiller Díaz good video man! really good!
Freediver Youbuur just found out about this technique... it really great, and yet so hard to learn, any way it is a good video
i dont get it
water pressure increases as you go deep (because the water on top of you increases and weighs more), compressing the air in your lungs. The air in your lungs gets denser (more squashed) and occuppies less volume (space) in your lungs. As you go back up the air gets less dense and expands because the water isnt pressing as hard anymore.
o en castellano, el agua pesa por lo que comprime el aire al bajar. al subir vuelve a expandirse a el volumen inicial porque el agua deja de 'apretar'
so what happens if you have deep sea diving equipment on with a mask and breathing tank? will it still be hard to breathe because even with that the weight from above is still on your lungs?
The container died.
Amazing that people were still alive on the titanic when it hit the ocean floor.
when i snorkle and dive to like 3m it hurts my ears and sinus, how do you do 55m!
equalize whenever pressure starts to build (this guy has a hands free method, but easiest way is to hold your nose and blow till your ears "pop". I'm no pro diver, but I think the rule is to equalize every 1 meter you go down, or 3 feet)
you have to equalize, most snorkelers doesn't know how to equalize their ears and sinuses and it will hurt as a result.
so that like what 90 psi
Thnx for posting.
U did comented on my video, similar experiment SOFABIKE login.
Since 2009y I am posting underwater videos on DEEPSWIM login-name
man you didn't have a boat with you??
i realize my lungs are compressing...but they are not filling up with water...this much I do know....the thing in place of water is really blood isn't it?
+T W I'm assuming you are refering to the mamal dive reflex wich - among other things - shifts blood into the lungs. Of course the blood is not in the lung itself but much rather in the lung tissue, meaning your lung gets meatier/thicker and thereby compressed less
It's more like plasma.
the water is just to show the compression. it doesn't represent anything. the plastic bag inside is compressing because of the pressure. the bottle is open so the sea water is getting in. that way, it's easier to display the compression
the thing I don't get is how you get exactly the same amount of air in the jug as when it decended and surfaced, because as a diver am sure air at least doubles in volume when surfacing you have to exhale while doing this to stop bends and worse case lungs popping why is the water still the same volume I cant get my head round that. I have done little experiments of my own like ltr pop bottles full then when I get to my depth its flat as a pancake yet never reaches surface in one piece as it explodes due to the fact air doubles on the way up, if I had to do the ceaser I would have to exhale all the time because of this why is it still a ltr when reaches surface??????
If you start the dive with 1 l of air you end up with 1 l of air. This is because no air is released and it is only compressed and expanded. The reason you exhale scuba diving is because you are breathing the 1 l of air at depth and when you ascend it expanded to the point where it is harmful.
+Pierce McAlpine I get that but what I don't get is if you send exactly 1ltre of air down I don't under stand the science side of it but it becomes x2 wether it be trapped or not 1ltr becomes at least one and a half litre on the way up, I don't under stand how you still get 1ltr when your experiment jug reaches the top how as the 1 ltre volume not expanded more than 1 ltre,, even free divers exhale ive seen them doing it on there video when they ascent air volume is always larger on ascent wether it is trapped or not, like I said ive taken 1 ltre bottles of air down to under stand about bends and stuff, and the bottles always explode because the 1 ltre volume sealed in the bottle becomes at least 1,5 ltre that is fact so how do yo manage to have 1 ltre still in the jug why does the volume not expand. im not trying to trip you or anything just trying to under stand how you get the volume to stay at 1ltre on ascent
It's not 1 liter of air at the bottom anymore. Volume changes with depth.
+Ryne Smith exactly thats my point but on surficing it should be more than the volume when it went into decent. when resurfacing the volume is far greater one litre should the on resurfice should be at least a litre and a half
You can not have more air than you had in the beginning. In the video, he started with 1 liter of air. He dove down to about 6 bar. This compressed the air down to about 1/6th of its original volume. 6 times the pressure means you are left with 1/6th the volume. This is called, Boyle's Law. Coming back up, he returns to the surface which, of course, is 6 times less pressure than at the bottom so the volume would increase to 6 times the amount that it was at the bottom. This brings it back to its original volume of 1 liter. Here is the math:
Boyles' Law: P₁V₁ = P₂V₂
P₁ stands for Pressure at depth
V₁ stands for Volume of air at depth
P₂ stands for Pressure at surface
V₂ stands for Volume of air at surface
P₁ = 6 bar
V₁ = 1/6 liter
P₂ = 1 bar
V₂ = What we want to figure out (The final volume at the surface)
6 bar ✕ 1/6 liter = 1 bar ✕ V₂
(6 ✕ 1/6 = 1 so:)
1 = 1 ✕ V₂
V₂ = 1/1 = 1
Therefore, the volume of air when returning to the surface should equal 1 liter.
For more information about Boyle's law, Wikipedia has a great article: en.wikipedia.org/wiki/Boyle%27s_law
some water got in the cup it wasn't the same
Me gustan los platanos de canarias
en el minuto 3:25 se le ve un huevo al camara, saludos cordiales. Y que pasen una buena tarde
is this not boyles law of pressure and volume the greater the pressure the smaller the volume
haha sorry mate didnt scroll down the rest of the title my mistake
The water goes in your lung. Science
Paul Atreide stupid. Stop confusing others! I hope you dont get to freedive or scuba dive, youre a disgrace to the society.
Anbody tell me what the effects of water pressure on the fish and the bottle of air.
Jessica Smith certain fish have stronger organs that are used to this depth. and if you brought them to less stressful areas like the surface they would die. the heart would pump blood so fast that they wouldn't be able to take it. a bottle would be crushed because it doesn't have enough integrity. the game Subnautica tells you all about it.
change happenz
Fortunatelly, water DOES NOT enter the lungs during normal dive :P
The water never get in, the bag get compressed (shrink) by the water pressure
No shit Sherlock
gülle 👈 jonas
omg your mad
my like turned it to 666 muhahahaha