Can a Boat Float In Supercritical Fluid? 

Dumb question maybe but why if it is 1000 psi the Styrofoam not crush?

Make sure the table wont screak so bad next time 😂

it was a little bit annoying to watch, but reading your explanation makes it less annoying. so maybe being more descriptive with your actions would help next time. thanks for doing what you do.

Shakes were cool btw I liked them. Please do it as you did, cause this is the reason we are here!

I didn't mind it honestly :D

Scientists write stuff down, he's more like messing around

@@Neuro_nActivation They say the difference between science and screwing around is writing down your results

@@Neuro_nActivation recording it on video is kind of a way of writing stuff down

@BelieveandrepenttoJesusChrist8feel better for writing that down?

Him holding a bomb moving it around up and down shaking it and playing with it lol

🤣

lmfao

Like instantly dissolving/oxidizing in the supercritical water!

Thats an US moment

That's probably why he's testing boats and not humans lol

do you think a gentle shaking will dislodge loads of very long bolts? lol

@@KarldorisLambley I do not. But it's amusing to see someone go from nervous to confident with the equipment. Less funny when you explain the joke.

Proceeds to heat it, which weakens the material

@@Qermaqwhat joke. him shaking it is not going to raise the pressure. he just wants to make the layers combine faster and to show the liquid surface disappearing.

@@HuyVhe heats it to raise the pressure. its part of the experiment and what the chamber is built for XD

Yes, I got motion sick.

*hypercritical

Yeah. I kept thinking about how he said that that pressure makes him nervous, and then he keeps shaking it, lol.

The problem is the whole table appears to shake at a low enough intensity that everything on screen moves a LOT but there inst much affect on the actual container relative to the movement. Which is very disorientating.

@@drb0mb ._.

"This report is super critical, if you don't do your job in time, you'll sink."

ah

Here dammit, take my like. Sucker for dad jokes.

Read this comment and immediately thought of mark normand.

You could basically get the same result here with regular water and compressed air, I remember a children's science experiment where you can make a toy submarine dive and surface just by squeezing the bottle it's in... Foam gets a lot of its buoyancy from the air trapped in it, increasing the pressure around it and compressing the trapped air in it reduces it's buoyancy

The real answers are always in the comments. The videos are shaky at best.

@@user-lb9cd2dx5l Ha! Nice pun, have my like.

This needs to be done with something that isn't a foam. And then the question is easy, and just depends on how dense the object you choose is - is it more of less dense than the mass of the CO₂ you use divided by the volume of your chamber.

​@@user-lb9cd2dx5l haaa Shaky

wow so many people apperently got distracted by that XD

he was shaking it to show the effect, otherwise youd just be watching a line slowly disappear which wouldve been far more boring, the number of people complaining about this is insane

​@@SpydersByteyou really believe everything you read on the Internet... Lmfao clown

​@@SpydersByte Shake it every once in a while. Not continuously. Was so irritating

Have you seen NileBlue's video? I think that one is on the same level, maybe a little better in some places.

wouldn't you mean, hottest?

don't swim in it

Was it super-critical CO2 or just liquid CO2? It's pretty easy to have industrial quantities of liquid CO2 but a real PITA to have even relatively small amounts of super critical CO2.

If they use knowledge of supercritical phenomenon as a hiring filter, they are fucking idiots. That's about as job-specific as it gets and it's THEIR job to teach you any pertaining knowledge.

@@GilmerJohninsightful question! The company currently has commercial processes that use supercritical CO2, but the owner just got a patent for a new process that will use liquid CO2, for precisely the advantages you cite, much lower costs for pumps, pipes, and containers.

Did you get the job?

So is the voice.

Cope

Pi timestamp

Why? Do you think a little shake will cause it to explode or something? Or is it just annoying to see? As he points out in his pinned comment, that's the best way to see it.

​@@kindlinnk, that's just annoying, you can still clearly see it wave because of the right side becoming supercritical and Moving around the whole "liquid"

​@@mif4731 so? he need to make a bad experiment just because you think it is annoying?

Well he was shaking it to make the line visible. I guess most people don't want to see that part of transition? Interesting thing on Google: meniscus seems to be the bending of the liquid on the surface directly. In the middle not the walls.

@@sszone-yt6vb The definition I got was simply "the liquid-gas boundary".

@@caydennormanton9682 The word comes from the Greek for "crescent" and refers to the curved part of the surface of the liquid where it meets the container, not the centre of the surface. Unless there is very little surface and it is all curved, as in a capillary tube. The OED has: "The convex or concave upper surface of a body of liquid resulting from the effects of surface tension and capillarity where the surface meets the walls of a container."

@@pattheplanter I looked into this further, and the definition you provided is the most accurate, and my simplified definition is incorrect: "A meniscus is the curved surface of a liquid in a container, influenced by the interplay of cohesive forces within the liquid and adhesive forces between the liquid and the container. The meniscus forms at the interface where the liquid contacts the container walls. If the adhesive forces between the liquid and the container are stronger than the cohesive forces within the liquid (as with water in glass), the meniscus is concave, curving upwards at the edges. Conversely, if the cohesive forces are stronger (as with mercury in glass), the meniscus is convex, curving downwards at the edges. This phenomenon is a result of surface tension and capillarity, and it is particularly pronounced in narrow containers like capillary tubes."

@@sszone-yt6vb I could see the line just fine when it wasn't shaking.

@@dasfoot ...or together...

Careful. You'll get calluses on your palms.

You sir, have just made the best idea ever!!!! I...must....see ....this....

Probably should be done in a separate shielded room for safety reasons

@@Nulley0 The Action Lab and Styropyro should be in separate shielded rooms for safety reasons

literal styropyro

put a hollow black sphere inside to shine the lasers on

i too came to the comments to complain about the shaking. god damn that was annoying 😭

XD

Glad to know I wasn’t the only one

then go to the motion stabilized video that he linked in his pinned comment

I don't even like it when he shakes it in the motion stabelized video either. it's just annoying me as much with both x.x

Perhaps some hollow gas filled glass spheres. I agree that it would be fun to watch. It was lazy to use the foam as it doesn't have a well defined density. Glass spheres would have different densities and we would expect some to go to the top and others to sink. Maybe he will try getting those spheres for a future video. Among other things he could go back and forth and watch the same balls sink or rise.

yew

@@GilmerJohn Yes; glass (while brittle) is very strong. And a sphere is an inherently strong shape.

Couldn't you get that to work with this very setup, by just using more CO2? The more mass you pack into the chamber, the denser it will be.

aerogel

you're not the only one there

thank you! it was killing me

I guess I'm the only one that disagrees. I liked seeing how the surface moved when shaking. I was also watching in fast speed though.

The shaking was super annoying

@@DANGJOS it was the kreeking table.

Wow, I have never noticed 39 likes before, well, think I relate to some of you.

My guess is the opposite - you’d die from oxygen toxicity. Oxygen becomes toxic when its partial pressure is greater than 1.4 atmospheres

No, you'd die from the toxicity.

oxygen becomes toxic under high pressure

​@@brooksbryant2478 You would die regardless of the pressure as it would be too much oxygen for you.

There's actually a good chance you'd catch on fire. High pressure oxygen is extremely unfriendly to organic compounds.

A bot copy pasted your comment 20:56 (6) 24/05/2024

The problem is how to manufacture something that is solid, doesn't compress to much under pressure and is then less dense than 0,464 g/cm³? Cyclopentane or CO2 is used to produce styrofoam. You'll more need a foam, that contain Helium or Hydrogen. But Hydrogen might react when you try to press it into hot liquid Polystyrene to get a foam. And the very small Hydrogen molecules and especially Helium atoms will just be squeezed out of styrofoam when it is set under pressure.

It should also depend on the ratio of air and CO₂ in the chamber. More CO₂ would mean a higher density which can more easily float a sufficiently light (relative to volume) object to the top.

@@seneca983 I honestly didn't even think about the air, but it should make a very small difference to the overall density. 99+% of that chamber should be CO2

@@DANGJOS It would've been possible to cram a lot more CO₂ into the chamber and that would've made a difference. I think he wanted the liquid surface to be about halfway in the chamber which makes sense because then it's easier to see.

sadly he photoshops the thumbnail putting in a fake situation

Gone. Reduced to atoms.

SHAKE IT MOAR!!!

@@holycow666*Mooooo r?

was about to say the same, stop shaking it !

Agree. I don't understand the compulsive shaking and it diminished the experience.

Someone had to say it. So frustrating to see it keep getting shaken.

It's like a liquid and a gas in one. It's a liqass

@@FleshWizard69420 -- Well, it's more like a liquid than a gas because it displayed great viscosity. In the "experiment" we say, the density of the super-critical fluid was about half that of the liquid part at a lower temperature.

It's a really dense gas Like how the earth's core is solid due to the immense pressure

There is active research work in determining if a supercritical state is "gas-like" or "liquid-like", so both answers are valid!

@@longemen3000 -- Well, I vote for ... LIQUID.

Apparently (I'm no expert, mind you) one of the properties of a supercritical fluid is it's ability to diffuse into/through other substances (like a gas). So my conclusion was that the Styrofoam becomes impregnated with the supercritical CO2, and is thus more dense than the surrounding CO2 (Styrofoam density + supercritical CO2 density = more dense than supercritical CO2).

Actually there is more going on here than just density changes. The styrofoam acts like a nucleation point and the opposite side of the chamber as a diffusion point. So particles are diffusing out everywhere but converging near the styrofoam pushing it against the wall kinda like convection

@@caydennormanton9682 The supercritical fluid behaves like a fluid and gas - it doesn't diffuse better than in it's gaseous state (except for any added diffusion due to extreme pressure). In rewatching the video he starts with a shot of the vessel with the dry ice packed in and then jumps to a view at 200 psi which already is 13-14 atmospheres so the shrinking - sinking is already well underway (in fact he says "the Styrofoam is very squished ...") and the bulk of it may already have happened. Had he left the ball intact instead of ripping it in half I may have been able to compare diameters at various pressures to see if the additional shrinkage was measurable.

was worried it would go boom

Exactly this nighore is not stopping at all

Dude I’m glad I’m not the only one.

When I first saw it in the video, I didn't know it was just randomly cut, I thought it was intentionally shaped to look like a brain.

It was driving me crazy! I wanted to see what was going on.

To see the meniscus or not.

@@28th_St_Airbut we can see it just fine without the shaking

I agree fully,I almost stopped the video

It’s true he was shaking the shit out of it

Truly is!

Yeah i think the shaking made it easier to see where the line between liquid and gas was when it started getting hard to tell

Seemed excessive to me.. once pr twice, fine. Also the shaking was too strong as well.

Next test superfluids?

Won't be (easily) obtainable... temperature is 5 Kelvin or -268 Celcius (-450.67 Fahrenheit) compared to the 31C of CO2

I agree. An occasional shake would b cool but the constant shaking was like dude wtf just stop.

The squeaking noise made me kinda mad

I actually said out loud "stop shaking it!"

Thought i was the only one feeling that 😂

Yeah it was ROUGH. Like, I thought it was neat how the styrofoam was moving to the side and back to the center while the CO2 was equalizing. NOPE YOU GET AN EARTHQUAKE TO THE TUNE OF A COUCH FOLD-OUT BED! ENJOY!

you can always do the experiment yourse- never mind that could go wrong

Disagree. I was hopeful and glad he did so continuously in order to keep things homogeneous.

Ur the annoying one lil girl gtfoh