The Levitating Liquid Pendulum 

I did enjoy the video, but now I'm scared of floating down to the bottom of wave pools

SERIOUS QUESTION: Could This Effect Be Used To Stabilize Planes Flying Around Or Faster Than The Speed Of Sound (Sound Barrier) ??? (Alternatively Could Active SonicBoom Noise Canceling Be Possible ???)

When I first read the title I thought this was going to move in the "sono-levitation" direction where water droplets are held in air with ultrasonic levitation. Which this kind of is... Very slow "ultrasonic" sound movements. Using the walls of the container as the friction point instead of atmosphere and and high frequency sound.

If I'm not mistaken I think this is the concept on how they are trying to make tall skyscrapers earth quake proof.

@@christopherj3367 You do realize the amount of energy it would take to keep such a building in motion? (also imagine what happens when there is a power outage, domino towers anyone?)

Wait does this mean Australia is just constantly vibrating? They must get a lot of upside down earthquakes.

Lol Tinney goes brrrrrr

@@luckystar3641 A whole continent full of hopping kangaroos will do that.

All of this is gold

God is a burley Swedish man who belts out a 120hz yodel from the center of the Earth to allow Australians to exist.

HAHAHAHAHAHAHAHAHAHA UPVOTED

Exactly 😁

... do i want to know why

Right?me too

I've been dreaming about this since I was a kid!

and tomorrow negative energy for the school science project warp drive engine

I know when I judged a high school science fair that student would've won top marks from me. So much more creative than the typical vinegar and baking soda Volcano thing that people keep putting in science fairs. Granted, the dude that had the volcano still got top marks from me because of their showmanship and the fact that they actually knew why volcanoes erupt.

@@ObscuriaDragunAed whatever it takes to encourage learning.

My science fair project was trying to see if holmium affects the measurable qualities of a superconductor. Unfortunately it failed due to a lack of properly prepared holmium to run the process, but still one of the coolest nerd things I've done. I'm absolutely here for this kind of funky science fair project

i really wish some flat earther can see this...

Steve’s wife: Give that back!

@@markm0000 holup

@@markm0000 😏

That makes no sense...

Well, come to think of it...

This is why we have equations. They give the final verdict Well, no, experiment is the final verdict

Is this dialectics?

Were not perfect beings. Most people forget simplest of things. Memory retention is hard. Holding shape for matter types must be too :D

She's going to be so disappointed when she finds out you're not planning to use them on her.

Sounds kinky

It's the recipe for a yeast infection

Vatan Rangani That’s how we can fuck gravity.

@@cezarcatalin1406 it's just a trick, the air pocket underneath the honey is pushing the honey upward, and the honey is soo viscous that when you vibrate them it settle to a flat & flatter form that seal the bubble from escaping. When you stop vibrating it, the honey start bending and break a hole that let the compressed air thru and the honey fall.

Shaking the head in a stable frequency helps

@@Anton-cv2ti Synchronized nodding of heads

Scientists don't start out sitting around and wondering. They start out as doctoral students who need to work on a novel piece of research in order to become scientists.

Image always taking the first scoop of honey right up until there's nothing left

but that is a problem that needs solving, what if i wanted a jar of levitating honey and i had no one to buy it from. they could sell it to me.

But what if you had a liquid fueled rocket that shakes a lot? It could be very bad if there is no fuel at the bottom of the tank where you are expecting it to be. I'm not saying this particular thing has ever been a problem, but a lack of understanding of strange physical phenomenon -- metal fatigue, rogue waves, soil liquefaction, etc., etc., etc. -- has, and will in all likelihood, continue to kill people.

@@andrewsnow7386 This is actually a significant issue for liquid propellant rockets and its called pogo (as in the stick). The F1 moon rocket had it quite badly due to combustion instability from the engine producing oscillation that caused oscillating fuel flow which only caused the instabilities to become worse until it burned out due to gulping ullage vapour (from the liquid oxygen and kerosene jumping up and down in the tank) - and also caused huge structural stress... these tanks are very thin, and hundreds of tonnes of explosive liquids jumping up and down in thin tanks is a Bad Thing lol It was solved with changing combustion chamber & injector geometry to suppress pressure waves - and installing liquid baffles compressed by helium to hold down the fluids.

its like hitting (or shaking) a bottle of viscous liquid (jam, ketchup, etc), that has an uneven surface, on the table. it smoothes out

Well spotted!

@@SteveMould that explains it! i thought video and audio were out of sync, but weirdly just briefly and none of the two seemed to be slowed.

Would a sufficiently high vibration frequency allow for water levitation?

@@Mernom yes. It'll work with anything

I thought I heard water during that part. That was because of his lips' movement, I think. My brain is playing games on me. Well spotted.

... but actually yes

*Mathematician:* "let's find the formula for this phenomenon in its most general form."

Me and a viscous fluid have something in common then!

I got to be the 420th like, too bad it wasnt at 4:20. Still an honor.

@@ChasenR Congratulations, I'm seeing your 420th like now

I wanted the scientists to deliberately "sink" the upside down boat (with a stick or something) - to find out if it would automatically flip when it got to the real surface

Sadly I think he could do a better job at explaining it. It is actually a stable equilibrium. Buoyancy isn't really applicable here. You have to dig further. Where does buoyancy come from? It comes from the different levels of pressure at different depths. Most of the time this pressure difference is caused through gravity: when there's a greater amount of water above it this will create more pressure. Next: how does pressure work? Pressure applies uniformly in all directions. So the buoyancy is created through a larger pressure underneath the object than above, so if you subtract the force pushing downwards from the force pushing upwards you will still get a resulting upwards force: buoyancy! But now the question is, how is the pressure in the liquid. I would presume that it's the lowest on the top and the bottom, and the maximum is somewhere in between in the lower half. So if you have something in the lower half it will experience a buoyancy downwards because the pressure over it is greater than under it. But then it starts to get interesting if you look at the air underneath it. This air also has a higher pressure...

@@edwardlane1255 I think, hypothetically, this depends less on the topic (i.e. the equilibrium between material of different density) and more to do with the design of the boat itself. We do have capsize resistant boats that will right itself after being flipped over; most boats don't once past its tipping point. Basically, this setup creates an isolated self-contained system that somewhat negates gravity; so much so we can assume no gravity when thinking within the confined boundary of this system. So, assuming the boat used has this self-fighting property, the vibration motion becomes the major contributing force to the boat's definition of "up" (relative to the fluid it should be buoyant in), compared to Earth's gravity. If you push the inverted boat beyond the middle point of the fluid it should be buoyant on, it will "identify" a new "up" (one that aligns with our experience); flip upright, and wave a nice hello to its little friend at the top. Extension: I think, if you push the top boat into the fluid, pass the middle point, it should self-right and end up floating inverted (it should not fall through the less dense air below because gravity as we experience it plays a smaller role in this contained environment; and what is practical gravity in this purpose?). The vibration is providing sufficient force to counterintuitively push the bottom boat, keeping it on the border between materials. It would probably depend on the frequency of the vibration relative to gravity; the closer it is, the easier it is to go pass the dividing line where the force maintains equilibrium. It would be fun to know how my uneducated guess is wrong.

@@tlqy , you've asked some great questions! The presence of vibrations does not change the fact that average pressure increases going downward (due to the gravity). Buoyancy is, indeed, a consequence of pressure integrated across the entire surface area. Average pressure at the top of the liquid is 1 atm. Going deeper (downward) into the liquid, the average pressure increases steadily. Exiting the bottom of the liquid and continuing downward, average pressure continues to increase, but not significantly (since air is low density). (I say "average pressure" because it actually fluctuates throughout each vibration wave: As the whole system is accelerated downward on half of the vibration wave, the fluid pressures in the container flip so that the maximum pressure is at the top of the container and the minimum pressure is at the bottom.) @SteveMould explained it correctly: If you were to "submerge" the inverted buoyant boat upward into the liquid, the average pressure on the upper surface would be less than the average pressure on the lower surface, thereby forcing the boat upward (traditional buoyancy). What's keeping the boat stable in the inverted position under the liquid is the same mechanism that keeps the liquid surface level: the vibration. If the inverted boat is slightly displaced upward (into the liquid), the vibrations will correct this by pushing harder upward on the surrounding liquid. Likewise, if the inverted boat is slightly displaced downward (away from the liquid), the vibrations will correct this by pushing harder upward on the inverted boat. If the boat is pushed too far downward (away from the liquid), it will be in the air and will fall down as usual. So, the boat has 3 stable positions: at the top of the liquid, at the bottom of the liquid, and at the bottom of the air under the liquid. The middle position has only a narrow band of stability.

"Ok so we need a object to show how the water displaces" "Hnnnggg boat"

"burn the witch!"

It floats. Like a witch!

@@namewarvergeben Floats upside down, like an Australian witch!

But if you think about it some more, it stops making sense.

Don't try to understand it, feel it.

Just noticed the same thing

That honestly creeped me out even more because I couldn't hear anything strange.

Two things. One .That is nicely done because he actually thinks...what most people do when they record a correction is they only speak that one word which will sound different than it would sound when spoken in a sentence because of phrasal intonation and emphasis. Second. He wanted to cover up the word "water" with the word "liquid" but then at @9:00 he said "water" again :P

Pretty soon it will be routine to edit the video to match the audio as well - maybe the least ominous application of deep fake

It's gonna be a real bummer when RU-vid decides we don't need descriptions anymore.

So if you want to straighten out a trailer in a tight spot just move back and forth really fast? Your analogy was actually super helpful!

@@deprivedoftrance well, it does make me wonder if there could be a way to vibrate the kingpin (which connects the trailer to the 5th wheel) to stabilize the trailer as you back it up.

@@vettechdave It would probably work on an icy surface but unfortunately not with rubber tires on tarmac/concrete... also the tractor needs to be heavier than the trailer...

Good analogy!

@@vettechdave you'd have to vibrate the entire unit (tractor and trailer), as well as provide frictionless movement sideways (i think). And of course, if vibrating the tractor you run the risk of finding the frequency that TESLA discovered that created violently UNSTABLE bowels....so we might want to use a remote controlled tractor!

If you could vibrate individual atoms in solids, you could cause "spontaneous" combustion. Learned this from a movie, not from school.

Time to buy a thousand vibrators

String theory. Yea.

@@ChasenR There is no need to vibrate them individually, you can just vibrate all of them. Which you can do, with a heat gun (it's like a powerful hair dryer), microwaves, fire, or an electric heating element. Though if you could focus it to just a small(ish) number of atoms, the effect would be localized, but stronger. Which you can do, with lasers. That's how powerful laser pointers can light matches and pop balloons, and industrial lasers can cut metal.

I am fixing my car light and TV this way

or maybe supermerged?

I like both of these!

Supramerged, to pay respect to Latin prefixes, would be my suggestion.

damn, I'm one hour late - was about to write exactly that: "upmerged".

now merge supermerged and upmerged to supmerged and you can confuse everyone

Indeed. Pretty sure the trapped air is pressurized, and opposing the average weight of the liquid. Which keeps the slug of mass suspended. The sidewalls only need to transmit dynamic force (so the shear viscosity needs to be high enough relative to the frequency or amplitude), it's not like friction is holding it up alone. As said in the intro, the liquid doesn't simply fall into the air space below it, rather its surface collapses; if the surface is forced to a stable level (by the vibration), it'll "levitate" quite happily! And we can see quite graphically that the slug of liquid is making a tight seal with the sidewalls; it's pretty rough around the edges, there's a lot of splashing, but the middle is making a continuous seal. If the slug of liquid were thin enough that the splashing breaks through the mass, it would fart out and collapse. Hey, so, corollary: this shouldn't work in vacuum! Liquid could be held in a container until cavitation forms (held by cohesion), but there's no suction or pressure to prevent it from collapsing once a cavity forms. Of course, you need specialized liquids to do that; vacuum grade silicone oil would do.

@@T3sl4 there wouldn't be air to levitate on in a vacuum

@@anderpanders6210 I know that's what I said

@@T3sl4 This also wouldn't work without a liquid ;) Edit: Maybe with some cohesive gasses and ridiculous vibrations it could work even without a liquid?

@@anderpanders6210 You could use gasses of different density and viscosity, but it probably wouldn't look as impressive.

Orrr he's just vibrating his hand with 120Hz frequency

Finally someone who used an existing word

Or alternatively you could fully lean into it and call it "upmerged"

Not to be mixed with suppermerged which is when you’re overworked and your head ends up merging into your supper.

@@Clifford_Banes What's his main quest?

yeah i'm still confused. given the shape of the submerged part of the boat, how could the water possibly give it buoyancy? it seems like the water can only transmit downward force there

@@grebe2332 Yes, the buoyancy keeps the ship down. (Although I'm not sure "down" is even the appropriate term to use here. “Partly out of the fluid” seems less ambiguous.)

@@anderpanders6210 @Valentin main quest is clearly comedian with Matt Parker

@@grebe2332 the oil is heavy, so the pressure of the gas below it must be able to hold the weight of the oil. Now, put a ball on the surface of that oil, the ball experience same pressure upward. But the oil exerted a flattening push/pressure due to the dynamics with the vibration, this is the opposing forces that prevent the ball from punching thru the oil.

Scp

Reverse buoyancy should be an SCP thing

en.wikipedia.org/wiki/Silicone_oil

It's something that plastic surgeons sell to women for $5,000. Fully installed...

@@thePronto - Now that's some scientific explanation right there.

@Evi1M4chine wut?

@Evi1M4chine I don't think you have to spend any money to enter. While these kinds of promotions are intended to make you spend money they can't make you spend money (I may be wrong if the laws are different in the UK)

Sorry sir, your application is invalid because you did not czech the UK resident box.

:^)

@@markp5726 good one mike

I'm sure it would work better in a frictionless environment, as long as cohesion is still a thing.

Windows blue screen intensifies.

the air pressure underneath the oil is high, it pushes the boat/ attempt to punch the boat thru the oil, but the vibration of the oil exert a flattening pressure on the oil, and the boat must resist this pressure. So when air pressure is equal to the flattening pressure then the boat stayed at the oil surface and never punch thru.

Sorry

@@xponen The boat is still denser than the air, so the boat should fall toward the earth. IOW, the high pressure air pushing the boat up is not the explanation.

@@fewwiggle that's like saying "denser than air contraption cannot fly". The reason it float is because the pressure is higher underneath the oil, the oil has lower pressure, ie: lift. You can test whether this is true; if it is true then when the boat detach from the oil it will fall to the bottom, if it is false then when the boat detach from the oil it will float back to the oil.

@Evi1M4chine precisely

Wa wa waaa... @Evi1M4chine couldn't get my JOKE!

2020 can’t surprise you ? Ha ! I bet you aren’t prepared for the Christmas surprise !

While being violently shaken up and down

That would be fun, but it might colapse then.

Shaken swimmer syndrome... lmao

An unstable vibrator would do, but there are other ways to generate vibration. The implementation detail doesn't matter, only the effect.

4:40 a prototype impotence cure combined with a sex toy that Steve is planning to bring to market. I don't recommend "Kapitza's Pendulum" as a brand name...

@@thePronto I don't know, it seems catchy.

the grains always so wet and it molds and rots.

You store silage in silos. You store grain in grain bins. Silos are sealed containers of a glass layer on steel which is why they're very dangerous to enter. A grain bin is just an empty hopped with a cover on top

www.ilfbpartners.com/farm/the-difference-between-grain-bins-and-silos/ Hier ist eine Webseite, die den Unterschied erklärt. Grain bin ist für dad Gran (auf Englisch) und ein Silo is fur die Silage. Sorry for my poor German. I only speak English and French

There's a typo in your comment though.

is there? which?

@@georgplaz silicon was written Silocon.

@@shanonfrancis5071 I have an extra w if you want to buy it 😁