What Happens to Tennis Ball at the bottom of the Ocean? High pressure chamber test!
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- Опубліковано 5 вер 2024
- What happens to tennis balls, ping pong balls or other balls when you submerge them to the bottom of the ocean into depth of 3 kilometers or 2 miles? We are going to use our 300 bar 4400 psi high pressure chamber with windows to find out! The chamber is pressurized by using our 40 ton hydraulic press.
Beyond the press channel / @beyondthepress
Link to how chamber is built video • DIY Deep sea test cham...
Our fan shop www.printmotor...
/ officialhpc / hydraulicpresschannel
Do not try this at home!! or at any where else!!
Music Thor's Hammer-Ethan Meixell
This is one of the most requested items to try out with the chamber from Beyond the press channel videos and since it's bit simpler and less technical I thought that it would fit this channel well. For more videos with this deep sea chamber check out our second channel ua-cam.com/channels/veB47lgzZJ1WOf4XYVJNBw.html
هلا والله
first reply
You should try a CO2 cartridge
You should try to show regelation. That's when ice melts from pressure but then refreezes when the pressure is released
Can you next try pieces of different copper and pvc pipes sealed with end caps? I think that would be very interesting
So golf can be played on the moon and on the ocean floor.
yes america will spend 1 trillion dollars to do this, perhaps trump can volunteer for service this time at mariana trench
Brilliant.
Golf balls are tough. Smarter Every Day fired them from an air cannon into an anvil at massive speeds and they only managed to break them by first weakening the ball by cutting it in spots.
@@jusb1066 Biden would think the Mariana Trench referred to a lady named Maria's cleavage.
No , but you can play golf on a sound stage set up to look like the moon
The explanation for the tennis ball withstanding the pressure is the following: the tennis ball is permeable, so water filled inside the ball at a relatively fast pace, in a way that the differential pressure (outside vs inside) was not enough to crush the outer rubberized skin. This result is also exacerbated by the fact that water is "incompressible" meaning that a huge amount of differential pressure would be needed to shrink a ball filled with water. Had this experiment used air, we would see a very different result.
I think water did enter the tennis ball, but there was also air in it that became compressed. Once the pressure was reduced, the compressed air could push the water out again. Btw, "sphere" not "spear".
@@user-xx2tf2fr7u a spear is a stick with a point on it. I think you mean sphere. And i think the Prince Rupert's drop is the strongest shape.
"...As ALVIN descends to the bottom, the ocean exerts a great squeezing pressure on its hull and on the air inside it-the titanium-doped steel is the best metal for standing up to the pressure, and the spherical shape is the best structure for standing up to the pressure!"
"Only ALVIN, with its spherical, titanium-doped steel body, was able to withstand the incredible pressure at the bottom of the sea, up to 4,000 meters down. And ALVIN has allowed humans to conduct some incredible expeditions. "
I don't think with air you would see much difference.
The air would be compressed inside the ball without the ball itself being compressed.
For the ball to be compressed there must be a pressure differential which simply wouldn't happen, if the then compressed air can can go into the ball.
@@nsacockroach4099 I do this with tennis balls frequently as part of repressurizing them for extended life. They usually cave in and stop being spherical at fairly low pressure, depending on how new they are and thus how much pressure remains internally. Tennis balls are designed to hold the internal pressure, so it doesn't leak too quickly. This collapse pressure varies but can be as low as 20 psi. The internal pressure of a new tennis ball is around 14 psi. As they age it drops and they will collapse at lower and lower pressures. They recover when the external pressure is reduced. So when repressurizing tennis balls that have collapsed the pressure is dropped until they return to spherical shape, then a pressure below that which they collapsed at is used for a few days and then gradually increased to 20-30 psi. After a few days they can be used again with restored bounce. They still wear, but the pressure can be restored at least temporarily.
The bottom of the ocean is surprisingly light and Finnish
yes, I noticed that too!
Finns are at home in crushing darkness
You'll find fins all over the ocean.
Maankohoaminen tarkoittaa maan hyvin hidasta kohoamista. Se johtuu uusimmasta jääkaudesta, jolloin jäätikkö painoi maankuoren lommolleen. Jäätikön aiheuttama maankuoren lommolleen painuminen on havaittavissa nykyään Etelämantereen ja Grönlannin jäätiköistä. Kun jäätikkö on sulanut, lommo pyrkii hitaasti oikenemaan. Kun maa kohoaa rannikolla, kuivaa maata ilmestyy, saaret kasvavat ja merestä ilmestyy uusia saaria. Suomessa maan kohoaminen näkyy selvimmin muun muassa Vaasan seuduilla Merenkurkun rannoilla. Merenkurkun saariston maapinta-ala kasvaa vuosittain noin neliökilometrillä. Koko Suomen pinta-ala kasvaa vuosittain noin seitsemällä neliökilometrillä.
Add the water so clean and clear. I can confirm that is not ocean water from off the California coast. :P
If anyone is wondering, the Titan sub would have been most like the ping pong ball
That's why I came here lmao
Yepp, except they broke at like 5 bar. Imagine the violence of implosion at 300 bar.
they should have made it out of golf balls
@sammo the golf ball material isnt even as strong as carbon fiber.
But then again the ball was put thru ONE test and its also not glued together with titanium end cap using bonding glue either.
Aw dang, every UA-cam video talking about the effects of deep underwater pressure is always someone beating me to the Titan 😮💨 I see we've all heard of it
You never get enough credit for the engineering that goes into your set ups. Really good job!
Styrofoam, guys! STYROFOAM IN THE DEPTH CHAMBER!!!
Yeah, we did this, very cool!
Yeah, like the cup they showed in the Azorian documentary.
Yes! Styrofoam cups!....anything made of different types of foam, please!
All of the YES to this comment!!
Also bubble wrap, different sizes.
"Something really complicated with freedom units" Perfect ! Lol !
Maybe try this: Leave things that will take on dissolved gases and water at pressure for a while, and watch them expand/explode as you decrease pressure. Like parts of plants or vegetables, fruit, grains (pop corn?)
I was actually thinking more in the "food" department. Have to wonder what fruitcake would do under those pressures.
But yes, the compression in these cases is just "neat", the decompression is going to be the "exciting" part.
Yes!!
Mother in-laws?
It's actually "popcoin", mate
Nope. These items are being pressurized with water...which does not compress. Or expand. If you want to see explosions, you need to pressurize these items in a high pressure AIR chamber. Not a water chamber.
Lauri seems pretty chill for a guy with such a high pressure job
Underrated comment!
Zing
Its cool seeing the little pocket of air all but disappear
I thought so too. I also noticed when I rewatched all the little bubbles on the walls shrink, disappear then reappear. Cool!
Can anybody explain what caused the air to seem to disappear and then re-appear?
@@erik34350 air compresses quite easily. If you have a volume of air inside you can crush it down to very very small size if you increase the pressure. High pressure will also cause the gases in the air to be “pushed inside” of the water (it dissolves), if pressure is returned to normal the water will not be able to hold the gases anymore and they will fall out of the water. Like opening a bottle of soda, there are no bubbles until you twist the cap, releasing the pressure and let the gases escape from the liquid.
@@Si-Al-Ti nice, good explanation. Cheers mate
@@Si-Al-Ti Now imagine that happening inside your blood. This is why time/depth dive charts are so important.
“Freedom Units is complicated”
Your meter literally has psi right on it 😂
Patriots per Square Independence days
yeh it also has bar.
I'm here to figure out what would happen to those people in the Titanic Tourist Sub.
same
I was on a United States Polar Ice Breaker. When we were at the South Pole our Marine Science Technicians would put Styrofoam cups in a mesh bag and send them to the bottom. The results are surprising. Draw on the cup first.
The south pole is 800 miles from the ocean.
@@jjohnston94 for those lucky few of us that have had the pleasure of being to ANTARCTICA ( 3 times) generally refer to The South Pole as anything below 66deg.
@@WARRANTW3 Imagine everyone that lives in the north just saying they live at the north pole. What a cheap claim to make. Only disrespects those that have actually been to the south pole.
@@JT-tz5hp imagine caring about something enough to be a dick to someone when it really doesn't fucking matter at all.
We did the same in the North Sea during ROV operations. We wrote the field name on them and the depth then put them inside a tin with holes in it. I have a collection of different sizes. The deepest was in a Norwegian Fjord at 550 meters depth.
Anyone else here because of todays Titan horrible news? Interesting video! Ping Pong Ball looks accurate.
True you are about the ping-pong ball, POP. If only they asked this these two, for a bit of a stress test...
That was the most amazing thing I have seen all day
Thanks! I am really pleased with the chamber and how it works. I have to just keep using the main camera on phone since video was bit poor with wide angle
@@HydraulicPressChannel great video guys
It’s cool to see how the ping pong balls stopped being buoyant after a certain depth
Most plastics compress in these pressures and become heavier
They probably had bubbles of leftover air trapped in them, and sank when the bubble was compressed small enough.
@@LordNeiman Those plastics float without bubbles too. Plastics compress easier than water, so they stop floating in high pressure.
@@teropiispala2576 *denser. The mass ("weight") of the plastic doesn't actually change.
@@sootikins That is almost too obvious
You know this could be good for marinating meat very quickly.
Food episodes are always... interesting...
Pressure cooker
I saw a marinating machine (marinade express I think it’s called) that uses a vacuum chamber to marinate meat quickly. It would be interesting to see the difference in taste of high pressure vs a vacuum.
That is brilliant!!
Fill that bad boy with teriyaki!! 😂😂
I think the reason why all of the balls suddenly broke (if they did) was because spheres are incredibly strong when force is applied equally on its surface. The balls not only had the internal pressure but a uniform amount of lateral(tangential?) compression across the whole surface until the single weakest point gave way.
Note to Navy - make submarines out of golf and tennis balls.
"If the Black Box is the only thing that survives a crash, why don't they just make the plane out of the Black Box?"
Replace tennis ball with 5 humans in a Jerry rigged submersible.
anyone after Ocean gate disaster !??!!!
Of course!
I work in the offshore construction industry and the classic thing that's done is to get a polystyrene cup and colour it in or draw on it then put it on an ROV. I will turn the cup from normal size to thimble sized with the picture shrunk on it too.
They should make deep sea craft out of giant tennis balls or golf balls or plastic balls 😊 a sphere can't be crushed with equal pressures on the surface. Elastic materials.
Who else is looking up pressure vids after the titan submersible imploded?
try styrofoam coffee cup, write channel name on in first
Also try non-cup styrofoam samples, such as a piece of technical product packaging, a few of those box-filling items (known in the US as packing peanuts). All of these were made in slightly different ways, however the common principle is that small polystyrene bubbles (beads) manufactured under high pressure to contain drops of pentane. Then at the product factory they are steam heated to above 100°C causing the polystyrene shell to soften while the pentane gas expands. Later during storage, the pentane leaks out and gets replaced by normal air at 1 bar. The hydraulic pressure chamber should squeeze each bead until it is about 300x smaller, possibly tearing apart the foam of bubbles.
Put non newtonian fluid into a clear ball, then put in chamber. Would be cool to see what it does under the higher pressure
Who is here after the Titan disaster?
Water must have diffused into the tennis ball and equalized the pressure.
Ping pong balls drowning was pretty damn fascinating. They got different amounts of air left in the shell after cracking and as pressure compressed air bubbles further they drowned one by one depending on how much air was left inside
Fun fact: I’ve actually been attacked by a peacock in the wild so you’re not wrong about them being extremely dangerous.
Those things can be nasty tempered for real
Years ago I watched a polystyrene cup being lowered into the ocean, I don't remember the depth. When it was pulled up it was perfectly formed but about 1/3 the size.
@1:43 you can see it jump. That is the back side of the tennis ball snapping in and inverting. You managed to get the axis of the inversion exactly perpendicular to the camera angle because when you zipped it in place the ties conformed to the shape of the ball on the front, but the holder plate put a very small point pressure on the back side. It just had to be unbalanced in order to steer the implosion
As a scuba instructor, I have used tennis balls as examples during deep training.
There was no implosion. Nothing happened to the tennis ball.
They should have made the titan sub out of golf balls 🤦🏻♀️
Really fascinating!!
It gives me the bends just watching the chamber return to aptmosphere!
Ayyy... This is a great idea for a new series! HPC always innovating...
4:00 Let's ask ChatGPT:
At 3 km deep in the ocean, the pressure acting on the tennis ball is 300 bar. To calculate the force acting on the tennis ball, we need to know the surface area of the ball and convert the pressure to the same units.
Tennis ball diameter: approximately 6.7 cm (2.64 inches)
Tennis ball radius (r): 3.35 cm (0.0335 meters)
Surface area of a sphere: A = 4 * pi * r^2
Let's calculate the surface area (A) of the tennis ball:
A = 4 * pi * (0.0335)^2 ≈ 0.0141 m²
Now, we have the pressure in bar, so let's convert it to Pascals (Pa):
1 bar = 100,000 Pa
300 bar = 300 * 100,000 = 30,000,000 Pa
Finally, we can calculate the force (F) acting on the tennis ball:
F = pressure * area
F = 30,000,000 Pa * 0.0141 m² ≈ 423,000 N
So, the force acting on the tennis ball at a depth of 3 km in the ocean with a pressure of 300 bar is approximately 423,000 Newtons.
To convert the force from Newtons to tons-force, we'll use the conversion factor:
1 ton-force (long ton, UK) = 9,964.016 Newtons
1 ton-force (short ton, US) = 8,896.443 Newtons
1 metric ton-force = 9,806.65 Newtons
Since it's not specified which ton you'd like to use, I'll provide all three conversions.
Long ton-force (UK):
423,000 N / 9,964.016 N/ton-force ≈ 42.46 long tons-force
Short ton-force (US):
423,000 N / 8,896.443 N/ton-force ≈ 47.56 short tons-force
Metric ton-force:
423,000 N / 9,806.65 N/ton-force ≈ 43.15 metric tons-force
In the imperial system, the unit of force is the pound-force (lbf). To convert the force from Newtons to pound-force, we'll use the conversion factor:
1 pound-force = 4.44822 Newtons
Now, let's convert the force from Newtons to pound-force:
423,000 N / 4.44822 N/lbf ≈ 95,078 lbf
So, the force acting on the tennis ball at a depth of 3 km in the ocean with a pressure of 300 bar is approximately 95,078 pound-force in the imperial system.
I think the soft with the impervious skin didn't break because the inside air was compressed to have the same pressure of the chamber. The ball material can take the compression so it was fine and the ball recovered to normal condition.
Cool experiment guys! I was surprised with some of those results!
Running "out of stroke" never leads to a good ending. :)
Draw on a Styrofoam coffee cup with a sharpie. then send the cup to the bottom of the ocean in your chamber. The cup will shrink to about 1/4 original size and stay that way. And the artwork you drew on the cup will be micro sized also. Use colored sharpies and the colors will be greatly intensified once compressed.
What sports can Spongebob really play?
I come back to see this again. For some reason I can't stop binge watching implosion videos lately.
Something pretty interesting happened with the ping pong balls after they broke. They continued to float on the top of the cylinder for a while but at some point sank to the bottom under increasing pressure. I think this happens because the water pressure compresses the plastic material to a point where its density becomes greater than water.
Well the tennis ball did better than I expected. Clearly a thick rubber sphere can handle the pressure. It did shink so that lessen the potential energy. Awesome demonstration.
The tennis ball did not crush because water seeped into it so the outside and inside pressure was the same.
It was clearly compressed, you can see it expand quite a bit when they release the pressure. I think it's just that applying pressure evenly to all sides of a sphere is really not as bad as you would think. A sphere is a really strong shape in this situation as long as the material is fairly uniform. I think the flexibility of the tennis ball also helps. If water was getting into the tennis ball somehow that would mean the air would have to escape, and that would have been pretty violent or at least visible. It wouldn't have happened before the pressure was applied either; simply putting a tennis ball in the water is not enough to make the water permeate rubber, the outer fabric layer just gets wet.
false
1:40 The tennis ball was compressing and then it bounced before the gauge moved.. If they cut it in half I think they'll find a tear, doesn't have to be a large one for the water to flood the interior of the ball while under pressure, on the inside of the ball where the water had ruptured the rubber.
@@paramourcat The air wouldn't need to escape at first, but as the chamber depressurised you would expect to see bubbles. I think your theory is correct.
I think if they clamped the ball slightly so its surface was dented, then it would have collapsed.
@@paramourcat The air would not have to escape to make way for the water. At 300 bar the volume of air is reduced to 1/300th of its normal volume. You can see this in how the bubbles elsewhere nearly disappear. Water would then fill the remaining 299/300th of the space, and exit through the same hole(s) when the pressure is released. I think the reason it flexed is because the crack in the ball would have been fairly small, so it would have taken a moderate pressure difference between inside and out to force water through it quickly. This would result in the ball expanding and contracting a little bit due this pressure difference. Spheres are pretty good at withstanding an evenly applied force but 300 bar seems like far too much for a tennis ball; it's three tonnes per 10 cm², or basically like driving a truck over it!
The ping pong balls give you a slight idea of what happened to OceanGate submersible. 🥶🥶🥶
The Tennis Ball so desperately wanted to escape the zip ties. But the zip ties won: Game. Set. Match.
Very interesting. The Titan people should have tested models of their hull in your pressure device !!
It is remarkable that the initials of High Pressure Chamber are the same ones of this channel.
The clip of the lightbulb at the end is. Good example of what happened to the titan submersible
Everyone is expert now. Typical hype chasers
All of a sudden relevant video after 2 years
Dear fellow Divers and aspiring ones, take this as class. @ 1:40 you see what happens when you start diving in. The ears are the first to notice the changing. At 2:30 you can clearly see why you cannot go up quickly and holding your breath. Great video.
Put a raw chicken leg into it to simulate what would happen to flesh
Nothing
Flesh is mostly water, and since water is incompressible, nothing really happens. What’s really dangerous for the body would the little air pockets in the lungs, sinuses, and intestines, which are compressible and thus can cause damage to the body.
Physics teacher: water is incompressible
Lauri: watch me crusch your bolls with woter!!
Anni: *explodes laughing*
Hey hydraulic press channel! Was there water in the football when you took it out? The design of the valve on a soccer ball should open when the pressure outside is greater than inside and allow water inside. Thanks for the nice video! Ride ride ride!
When the pressure of the capsule increases, the density of the air inside the balls increases and makes them stop floating since the air becomes denser than water, while the density of the water does not change, it is incredible to be able to see it from that way
I’ve been studying Finnish for the past year. Difficult but fun! Hyvä video!
ei satanna
Not an easy language is it? Out of interest, why are you learning it?
@@cambridgemart2075 My grandma spoke it fluently and I only learned a handful of words and phrases. Now I’m just studying as a hobby. My biggest regret is not asking her to teach it to me when I was younger
@@obnoxious_cow3582 My wife, who is a Finn, is trying to get me to learn it, progress has been very slow!
Looks like oceangate should have used callaway for their sub construction
The ping pong balls sinking and then floating again is really neat.
Yeah, I'd love to know what's causing it to lose it's buoyancy like that!
@@tonysansom I would venture to guess that the high pressure is causing the water molecules to trap itself in between the plastic molecules adding weight to the entire structure. The plastic molecules plus pressure fused molecules makes it heavier than the surrounding water thus sunking. Once pressure is released the water molecules trapped escape and the ping point balls become lighter again. Just a guess
@@tonysansom or that the high pressure of the water reduces the kinetic energy of the water and the moving water molecules can no longer support the weight of the plastic ping point balls. I would like to know the real answer as well
@@alphawhiskey3311 Sounds feasible. If the structure of the plastic is such that, at sea-level air pressure, it has large enough 'holes' that air molecules can fit inside the structure then when the water pressure increases the air molecules compress and make room for heavier water molecules therefore making the plastic effectively heavier. I'm probably over-thinking but I get curious about such things 😀
Umm... No. Sinking or floating in water has nothing to do with how "heavy" something is. It has to do with density. Density is determined by mass divided by volume. Water is very very difficult to compress. Plastics are much easier to compress. As pressure is added to the chamber, the mass of the plastic balls does not change, but because they are being compressed, the volume they take up gets smaller, although it's by a small enough amount that we can't really see it with the naked eye in this experiment. Since the mass does not change, but the volume decreases, the density of the balls increases, to the point that they become more dense than the water. This causes them to sink. The water itself does not get more dense, because it is much more resistant to being compressed.
Interesting. Well I think anything pliable has a better chance. On the submersible that people just died on, the shell was carbon so I’m not sure what the difference would be, but I know engineers did not like it years ago. Tensile strength if I am using the right word. I don’t know anything about metallurgy or engineering or science, but just logically, if something is made brittle, it will probably break up more than something that is pliable. On the other hand, you had several types of material and that submersible, requiring a joint at every change, and at the joint, I don’t believe you do want pliable because that would cause them to come apart. Hopefully one of these young science students will comment on this and correct my post. Thank you and thank you very much for allowing us to see this experiment
If you came here to watch what happened to the titanic sub let me know 🤣🤣
Why you laughing?
@@okand1921 dead billionaires are funny
I think what happened with the tennis ball is that, being tightly attached to the plastic support, its back was already slightly pushed in by the plastic support. Then with pressure applied, the back of the ball (that we couldn't see) continued to be pushed in by the water pressure. This is similar to holding the ball in your hands and pushing your thumbs into the ball. So the deformation was all from the back side, but the front side remained unaffected. Pretty simple really.
Edit:If you were to pull the air out of a tennis ball with a syringe, that's the shape the ball would take; the "back side" caving into the ball until it touches the "front side".
To confirm: one can put a mirror at 45 degree , looking down on the tennis ball, in the pressure chamber so one has a recorded view from the top and from the front.in the same frame.
@@pppppierre Good idea!
When a tennis ball is tougher than your sub. 😂😂
What will happen to a fresh, intact bone - maybe from a pig or cow?
People here for Ocean Gate owe you an amount of gratitude for asking this question...I think I know where you're going with this...
Do they look like the ones after the Byford Dolphin Accident or was this not the same as Deep Sea Pressure ?
Tennis ball: *gets subjected to 4300 PSI of hydraulic pressure
Tennis ball: "Pathetic."
new content! Great idea! From Russia with luv
I believe the reason for the tennis ball apparently not crushing is because we just did not see it. I think it buckled inwards and made a big dimple from behind, the part you can't see. It makes sense, since it was tied with some zip ties to a flat surface, which probably created enough of a point load to initiate the buckling from behind. Leaving it free-floating would have been better here.
What will happen to a can of salted cucumber at bottom of the ocean?
I think there is only one way to find out :D
2023 : video re-made but this time it's 5 humans
Brilliant work guys, love the pressure and force calculations.
Thanks for sharing and stay safe all.
I feel responsible to ask you to please be careful with pressures like that. I know that vessel is designed to handle those pressures. But, having worked in and around hydraulic fracturing for over 6 years now I've seen examples of static pressure lower than that causing death and serious serious injury when a failure occurred. Plus, the implosion of objects inside there is creating a shock wave much like cavitation which I've seen deeply pock mark solid tungsten like a golf ball. Unimaginable force. The bolts that are holding the plugs or caps at the end are probably stretching minutely as well with each cycle and torquing and if they aren't torqued in the correct pattern force can be applied unevenly and cause one to bear more load than they are designed for and fail.
When we change flanges and blank flanges we pull the studs and nuts and scrap them every time as the torque and working pressures applied stretch the threads and studs which can lead to failures in time. I've seen them simply blow off. Again, higher pressure normally but not always.
I'm sure you probably know all of this but I just like to remind folks to be careful because of the things I've seen happen. Thanks for another great video! Take care!
do a polystyrene cup you'll thank me
I love the advanced finglish spoken on this channel. Marcus Grönholm would be jealous.
Lmao everyone here after oceangate
Yeah.
We used to play pass the bottle when sky diving. Put the lid on at height 14.000 feet and then pass it around in free fall and see how much it is crushed once back on the ground. This channel always reminds me of that
Sometimes the lack of explosion is just as intriguing as explosions (or, in this case, implosions).
We like how this man does the experiments; he shows every step. Mostly, when experiments are shown, only the successful ones are portrayed, giving the false impression that the experiment was successful at once. But, like most of us trying something out, a scientific experiment is not any different. There are more mishaps that eventually, through trial and error, and learning, lead to insight and success. Bravo
Soda can would be an interesting thing to crush.
4:00 If you put an elastic, gas filled ball (or any elastic container) under equal pressure from all sides, that rises not too fast, there is no reason for it to implode or getting destroyed. The gas inside will simply pressurize to the same pressure as outside and the force on the inside and outside of the wall stays equal. The gas and ball (or container) shrink together.
Only if the ball is made from a non-elastic material, you would expect it to get damaged, because it cannot follow the shrinking gas whithout breaking.
If you put a thinwalled gas filled cylinder inside the press, that has a well sealed, but free moving piston in one side, it should survive.
That actually would be an interesting experiment:
- Get a pipe made from arcrylic glass or transparent polycarbonate.
- Seal one end and put a free moving piston in the other end. The piston needs to be long enough so it doesn't tilt, when moving.
- The Piston should be well sealed, e.g. with several o-rings in grooves around the piston. The O-Rings should be lubricated.
- Test it in your contraption. It should survive any pressure you can create in your contraption.
- It would be interesting to fill it with different gasses and compare the behaviour.
- Filling it with CO2 gas could be interesting.
* At room temperature, you might be able to liquify it, by raising the pressure. Lowering the temperature of the surrounding water makes that easier.
* If you raise the temperature of the water above 31° C and the pressure above 74 bar, you might be able to get supercritcal CO2.
What would happen if you put the clay creations that you show at the end of your videos into the high pressure chamber?
The tennis ball is understandable if you assume the covering is porous and acts like an RO filter at high pressures. The ping pong balls were surprising, because I've accidentally damaged so many while playing ping pong. But because the way the forces act on the sphere, motion is constrained in certain directions, and it failed in a shear mode. Excellent video!
So, a tennis ball can hold on the pressure better at 3000 km deepth than a sumersible made in titanium and carbone. Just show this video to sumersible builders.
Why? So they can make a submersible out of tennis balls?
@@heyimchris1607 Right a big tennis ball and the problem is solved
It withstood the pressure because it is a ball.. The pressure is equally distributed against the surface area, and the ball reinforces itself from all directions. This is why a sphere is the optimal structure for withstanding great pressures.
Came here after the Ocean Gate sub. Nightmarish stuff. Thankfully, they didn't suffer. Rest in peace.
Same here , now I have the idea of 3000+ PSI
Try one of those carbon fiber paintball gas cylindars. Filled to normal pressure with air.
What's strange is how the broken ping pong balls sank when the pressure was high but started to float after
Yes -- I wondered if there were small air bubbles trapped by the broken shells, perhaps clinging to the plastic. Once the pressure is relieved the air swells and the density returns to a low enough point that it can lift them again... ?
@@CaseyConnor I think that is a good answer. 👍
Its because of the weight pushing down on it
Umm.. No. Sinking or floating in water has nothing to do with how "heavy" something is. It has to do with density. Density is determined by mass divided by volume. Water is very very difficult to compress. Plastics are much easier to compress. As pressure is added to the chamber, the mass of the plastic balls does not change, but because they are being compressed, the volume they take up gets smaller, although it's by a small enough amount that we can't really see it with the naked eye in this experiment. Since the mass does not change, but the volume decreases, the density of the balls increases, to the point that they become more dense than the water. This causes them to sink. The water itself does not get more dense, because it is much more resistant to being compressed.
I don't know if someone already mentioned it within the 1000+ comments here, but there are two types of tennis balls being made and sold.
There is the type that actually contains a gas-filled sphere. This type of tennis balls ships to the customer within a pressurized can, which can be easily recognized by the "puff" when opening the can for the first time. This type is usually only used by professional tennis players, because after opening the pressurized can these balls loose air so quickly that they become unplayable after a couple of weeks already, even when they are not actually being played with.
The other type of tennis balls doesn't have any sealed air inside. These are what most occasional tennis players use, because these balls can last for many years.
The tennis ball used in this video is obviously of the later type.
4:43 So a ping-pong ball can withstand about 60 meters or 197 ft of pressure.
8:45 I see The Stig made a mysterious appearance in your video.
It's the Stig's Finnish high pressure chamber dwelling cousin.
8:36 "Okay and the last one, football or soccerball...not the Hands-Egg"
😂 LMAO WAY TO TELL THEM YOU TAKING SHOTS ON THEM NFL CHUMBOIS
3D print some different types of small submarines and see which shape holds out the longest.
I mean because they're spheres the pressure on all sides is very close if not exactly even, spheres are extremely strong in those scenarios. When you crush the tennis ball with your hands, you're applying pressure to one location, somewhere else on the ball has to essentially expand to allow that deformation, with even pressure across the entire surface, this type of deformation is much harder.
It's amazing how water at the bottom of the ocean is seemingly void of air bubbles. Maybe, not because they're not there, but because the air is so compressed you can't see them.
True? Never knew that. Very interesting.
@@bari2883 Water is a non-compressible fluid. Air is not. So you can see the bubbles getting smaller and smaller as the pressure increases till they nearly disappear, which is not something you see anywhere near the surface.
This is kind of how decompression sickness aka the bends happens in scuba divers. When compressed air is breathed in at depth, your body stores nitrogen bubbles in your bloodstream since air is mostly nitrogen. As you come to the surface, the bubbles get bigger which is why divers have to come up very slowly and do safety stops along the way. This allows the nitrogen to slowly off gas from their bodies. If they come up too fast...well, imaging those air bubbles growing really large really fast in your bloodstream. 😬
@@Dalyluvr Very true. Seeing those bubbles expand as the pressure is released is pretty trippy as that's essentially what is happening in your body as you ascend.
Additionally, in aviation, we have to wait around 18-24 hours before flying after diving because of that reason. But only if you are diving with oxygen. If you free dive, that doesn't apply; I think because you're holding your breath at surface level pressures instead of breathing compressed air from a tank.
And that's why you will never raise the Titanic by filling it with Ping-Pong balls.
When the tennis ball built better than the Titan. 💀
When you explained that water got into the tennis ball, it made sense. In the very beginning, it was shrinking. But then it stopped shrinking. I guess when it stopped shrinking, even though the pressure was increasing, it's because the water was getting inside. And even though the water was getting inside, it stayed in its shrunken state instead of swelling back up. I think this is because a tennis ball typical has pressurized air inside (which is why new tennis balls come in pressurized cans). So what we see as a normal tennis ball is actually slightly inflated from the compressed air inside. The size of the tennis ball at the bottom of the ocean should be the size of a non-inflated tennis ball.
And then it swelled back up as the pressure was released, but I'm guessing this is only temporary, and it will shrink again as the pressure leaks out of it.
I didn't know things lose buoyancy under higher pressure. That's actually pretty amazing
Came here to imagine the titan sub. 😢
The shape of an egg is the most stable shape in a fluid. You can see from this experiment that the tennis ball remained the shape of an egg for much longer than its original shape of a ball or sphere.
The way pingpong balls plastic shells lose its buoyancy at higher pressure is priceless. So it is actually changing the density of the plastic compressing it.