The Levitating Liquid Pendulum

2020 ж. 7 Қаз.
1 396 071 Рет қаралды

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I'm reluctant to say "gravity defying", but come on, this is cool! You can levitate a viscous liquid just by shaking it! Not only that but a buoyancy effect appears on the other side. I also show Kapitza's pendulum.
Here's the playlist of videos that feature the stroboscopic effect:
• Videos featuring the s...
Here's the original upside down pendulum video:
• Upside down pendulum
David Acheson's books are here:
academic.jesus.ox.ac.uk/dacheson/
The Kapitza pendulum paper is here:
butikov.faculty.ifmo.ru/InvPen...
Here's the research that lead to all the nice levitation footage from Benjamin Apffel, Filip Novkoski, Antonin Eddi and Emmanuel Fort:
arxiv.org/abs/2003.04777
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Пікірлер
  • A big thank you to Benjamin Apffel, Filip Novkoski, Antonin Eddi and Emmanuel Fort for giving me their experimental footage. Hope you all enjoyed the video!

    @SteveMould@SteveMould3 жыл бұрын
    • I did enjoy the video, but now I'm scared of floating down to the bottom of wave pools

      @InvadersDie@InvadersDie3 жыл бұрын
    • 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 ???)

      @choiceschoices5910@choiceschoices59103 жыл бұрын
    • 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.

      @Scott_C@Scott_C3 жыл бұрын
    • If I'm not mistaken I think this is the concept on how they are trying to make tall skyscrapers earth quake proof.

      @christopherj3367@christopherj33673 жыл бұрын
    • @@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?)

      @choiceschoices5910@choiceschoices59103 жыл бұрын
  • Finally. I've always wanted to levitate some silicone oil but was never quite sure how to achieve it.

    @Fraxxxi@Fraxxxi3 жыл бұрын
    • HAHAHAHAHAHAHAHAHAHA UPVOTED

      @3693G@3693G3 жыл бұрын
    • Exactly 😁

      @lukegrigorian3192@lukegrigorian31923 жыл бұрын
    • ... do i want to know why

      @pvic6959@pvic69593 жыл бұрын
    • Right?me too

      @yee9072@yee90723 жыл бұрын
    • I've been dreaming about this since I was a kid!

      @CynHicks@CynHicks3 жыл бұрын
  • Ohhh, so _that's_ why Australian boats don't fall off the Earth.

    @U014B@U014B3 жыл бұрын
    • Wait does this mean Australia is just constantly vibrating? They must get a lot of upside down earthquakes.

      @luckystar3641@luckystar36413 жыл бұрын
    • Lol Tinney goes brrrrrr

      @roidroid@roidroid3 жыл бұрын
    • @@luckystar3641 A whole continent full of hopping kangaroos will do that.

      @robertkesselring@robertkesselring3 жыл бұрын
    • All of this is gold

      @2blocksonthewall4253@2blocksonthewall42533 жыл бұрын
    • God is a burley Swedish man who belts out a 120hz yodel from the center of the Earth to allow Australians to exist.

      @dangerouspie0319@dangerouspie03193 жыл бұрын
  • "Inverted buoyancy" is definitely a high school project winner. Looks so simple, yet so unreal.

    @John_C_J@John_C_J3 жыл бұрын
    • and tomorrow negative energy for the school science project warp drive engine

      @rawnukles@rawnukles2 жыл бұрын
    • 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@ObscuriaDragunAed Жыл бұрын
    • @@ObscuriaDragunAed whatever it takes to encourage learning.

      @mrwess1927@mrwess1927 Жыл бұрын
    • 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

      @sylvrwolflol@sylvrwolflol Жыл бұрын
    • i really wish some flat earther can see this...

      @thepoppunx@thepoppunx10 ай бұрын
  • "Here is my vibration generator" Okay, Steve.

    @JHA854@JHA8543 жыл бұрын
    • Steve’s wife: Give that back!

      @markm0000@markm00002 жыл бұрын
    • @@markm0000 holup

      @boxed_in4357@boxed_in43572 жыл бұрын
    • @@markm0000 😏

      @chrisbustos1431@chrisbustos1431 Жыл бұрын
  • 9:50 but in the end, the making sense of the problem averages out until there is a stable making of sense.

    @federicoaguilar7610@federicoaguilar76103 жыл бұрын
    • Shaking the head in a stable frequency helps

      @Anton-cv2ti@Anton-cv2ti3 жыл бұрын
    • @@Anton-cv2ti Synchronized nodding of heads

      @NicolaiSyvertsen@NicolaiSyvertsen3 жыл бұрын
  • 8:40 You originally said "body of water", didn't you. I almost didn't notice the overdub, that was really well done.

    @qfz2112@qfz21123 жыл бұрын
    • Well spotted!

      @SteveMould@SteveMould3 жыл бұрын
    • @@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.

      @georgplaz@georgplaz3 жыл бұрын
    • Would a sufficiently high vibration frequency allow for water levitation?

      @Mernom@Mernom3 жыл бұрын
    • @@Mernom yes. It'll work with anything

      @ericl8743@ericl87433 жыл бұрын
    • 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.

      @cursh6898@cursh68983 жыл бұрын
  • This upside down buoyancy is the most incredibly interesting thing I have seen in a long time!

    @rubeningels5060@rubeningels50603 жыл бұрын
  • Wow, I've seen lots of mind-bending science youtube videos but a boat floating upside down on the bottom of a levitating lake of silicone oil might take the cake. Great video!

    @nickjanssens1045@nickjanssens10453 жыл бұрын
  • "It makes no sense until you think about it for a bit. And then it makes sense again. And then you think about it a bit more, then it stops making sense. And then you think about it even more, and then it makes sense again" This applies to a lot of things in life and life in general lol

    @PJoriginal@PJoriginal3 жыл бұрын
    • That makes no sense...

      @97ynoT91@97ynoT913 жыл бұрын
    • Well, come to think of it...

      @97ynoT91@97ynoT913 жыл бұрын
    • This is why we have equations. They give the final verdict Well, no, experiment is the final verdict

      @columbus8myhw@columbus8myhw3 жыл бұрын
    • Is this dialectics?

      @DABATTLESUIT@DABATTLESUIT3 жыл бұрын
    • Were not perfect beings. Most people forget simplest of things. Memory retention is hard. Holding shape for matter types must be too :D

      @Andytlp@Andytlp3 жыл бұрын
  • "Dear, why is honey and 120 Hz Vibration generator on the shopping list?"

    @JevinJohnson-CloudShift@JevinJohnson-CloudShift3 жыл бұрын
    • She's going to be so disappointed when she finds out you're not planning to use them on her.

      @imveryangryitsnotbutter@imveryangryitsnotbutter3 жыл бұрын
    • Sounds kinky

      @vatanrangani8033@vatanrangani80333 жыл бұрын
    • It's the recipe for a yeast infection

      @rab3ar@rab3ar3 жыл бұрын
    • Vatan Rangani That’s how we can fuck gravity.

      @cezarcatalin1406@cezarcatalin14063 жыл бұрын
    • @@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.

      @xponen@xponen3 жыл бұрын
  • That visual aid at 8:58 was perfect, really connected the concept of 'accelerating downwards = negative g's = smoother surface' to my intuitive understanding of how I imagine things would work

    @BenHanson137@BenHanson1373 жыл бұрын
    • its like hitting (or shaking) a bottle of viscous liquid (jam, ketchup, etc), that has an uneven surface, on the table. it smoothes out

      @deathhound9400@deathhound94004 ай бұрын
  • 1:51 Ah! I see the scientist is a man of culture as well.

    @nulldeathwhat7200@nulldeathwhat72003 жыл бұрын
  • 1:40 - "A group of scientists were working on the problem..." It amazes me that someone was sitting around and one day thought, "The fact that honey doesn't levitate in the middle of a jar is a real problem that needs solving."

    @DavidCourtney@DavidCourtney3 жыл бұрын
    • 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.

      @asailijhijr@asailijhijr3 жыл бұрын
    • Image always taking the first scoop of honey right up until there's nothing left

      @Anton-cv2ti@Anton-cv2ti3 жыл бұрын
    • 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.

      @HasanProd@HasanProd3 жыл бұрын
    • 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@andrewsnow73863 жыл бұрын
    • @@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.

      @mduckernz@mduckernz3 жыл бұрын
  • Scientist: Are you stable? Viscous liquid: Well yes, but actually no

    @andrewrobotbuilder@andrewrobotbuilder3 жыл бұрын
    • ... but actually yes

      @Beerfazz@Beerfazz3 жыл бұрын
    • *Mathematician:* "let's find the formula for this phenomenon in its most general form."

      @Peter_1986@Peter_19863 жыл бұрын
    • Me and a viscous fluid have something in common then!

      @coreyskuse9387@coreyskuse93873 жыл бұрын
    • I got to be the 420th like, too bad it wasnt at 4:20. Still an honor.

      @ChasenR@ChasenR3 жыл бұрын
    • @@ChasenR Congratulations, I'm seeing your 420th like now

      @andrewrobotbuilder@andrewrobotbuilder3 жыл бұрын
  • Amazing! This reminds me of something else... This stabilising effect of a vibration to a vertical structure can also be illustrated in five storey pagodas common in Japan. The topmost spire or sorin consists of a shaft on which floating rings are attached near its base which springs from the roof. This shaft runs along the entire core of the tower and is free floating. On an event of an earthquake, the rings jiggle vigorously, stabilizing the shaft. This , together with the manner of construction of the tower, ie wood joinery, are believed to contribute to the overall seismic resilience of the structure. These pagodas are vaunted to have survived severe earthquakes.

    @hungryanimal5112@hungryanimal51123 жыл бұрын
  • This was a really good video, this is a marvelous effect I never knew existed and it goes completely against my intuition. The video explained everything very well and in a simplistic manner, and I found it genuinely entertaining to watch. Thank you!

    @lucmar6867@lucmar68673 жыл бұрын
  • The "Inverted Buoyancy" part of this should probably be mentioned in the title. I would watch a whole video only about that!

    @scientificconsideration8294@scientificconsideration82943 жыл бұрын
    • 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

      @edwardlane1255@edwardlane12553 жыл бұрын
    • 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...

      @tlqy@tlqy3 жыл бұрын
    • @@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.

      @IHateUniqueUsernames@IHateUniqueUsernames Жыл бұрын
    • @@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.

      @mattcarter1797@mattcarter17977 ай бұрын
  • I love the little boat the put in there. I'm just imagining an excerpt from their paper on this effect. "Compared to a liquid at rest, the analogue navel vessel (ANV) displaces..."

    @nikanj@nikanj3 жыл бұрын
    • "Ok so we need a object to show how the water displaces" "Hnnnggg boat"

      @finn596@finn596 Жыл бұрын
  • Dude, great work in the edit, that voice over of 'Liquid' when you say 'water' is seamless! Even got the tamber on point. Well done!

    @BricktowneMedia@BricktowneMedia3 жыл бұрын
  • It actually looked to me like the inverted boat was covered in a film of oil. In fact, some drops of oil could be seen dripping off the tip of the mast. Could it be that surface tension was playing a role in keeping the inverted boat in position?

    @mg4695@mg46953 жыл бұрын
  • 8:40 That was a flawless audio correction. I'm so impressed. The only way to tell was the missed synced lips, but even then I couldn't believe it. Awesome. The floaty liquid is cool too.

    @louis1001@louis10013 жыл бұрын
    • Just noticed the same thing

      @Videohead-eq5cy@Videohead-eq5cy3 жыл бұрын
    • That honestly creeped me out even more because I couldn't hear anything strange.

      @FlorianLinscheid@FlorianLinscheid3 жыл бұрын
    • 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

      @marian-gabriel9518@marian-gabriel95183 жыл бұрын
    • Pretty soon it will be routine to edit the video to match the audio as well - maybe the least ominous application of deep fake

      @fowlerj111@fowlerj1113 жыл бұрын
  • Excellent parlor trick of science. Reminds me of early electrical and magnetic display pieces presented to explain what is really happening! Love your videos

    @joelnorton9742@joelnorton97423 жыл бұрын
  • Enjoyed the video, thank you. One matter which stood out to me was you 'free from gravity' demonstration 0n the table. The effect is exactly how a semi-trailer works when being pulled (driving/turning forward) and being pushed (backing the trailer into a dock/around a corner).

    @vettechdave@vettechdave3 жыл бұрын
    • 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@deprivedoftrance3 жыл бұрын
    • @@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@vettechdave3 жыл бұрын
    • @@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...

      @pwkoert6594@pwkoert65943 жыл бұрын
    • Good analogy!

      @SolidSiren@SolidSiren3 жыл бұрын
    • @@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!

      @markdoldon8852@markdoldon88523 жыл бұрын
  • 10:07 "Submerged seems a bit wierd in this context", how about upmerged?

    @permik@permik3 жыл бұрын
    • or maybe supermerged?

      @georgplaz@georgplaz3 жыл бұрын
    • I like both of these!

      @SteveMould@SteveMould3 жыл бұрын
    • Supramerged, to pay respect to Latin prefixes, would be my suggestion.

      @FernandoJRodriguezFernandoJRM@FernandoJRodriguezFernandoJRM3 жыл бұрын
    • damn, I'm one hour late - was about to write exactly that: "upmerged".

      @Shadow81989@Shadow819893 жыл бұрын
    • now merge supermerged and upmerged to supmerged and you can confuse everyone

      @Beerfazz@Beerfazz3 жыл бұрын
  • Loved your pendulum explanation with the torque and perpendicular forces, actually quite intuitive!

    @richardpike8748@richardpike87483 жыл бұрын
  • I wanna say thank you man and please keep making these videos. I just now found this channel and i LOVE the fact that i get to listen and learn SO DAMN MUCH. Like..... yes. The world needs this lol

    @yajnavalkiagargi8100@yajnavalkiagargi81002 жыл бұрын
  • Steve "I'll leave a link to it in the description" Mould 😂

    @WhiterunGuard11998@WhiterunGuard119983 жыл бұрын
    • It's gonna be a real bummer when KZhead decides we don't need descriptions anymore.

      @StraightOuttaJarhois@StraightOuttaJarhois3 жыл бұрын
  • Inverted boyancy... "when you think about it, it makes sense" NOPE HE'S A WITCH

    @Billiegoose@Billiegoose3 жыл бұрын
    • "burn the witch!"

      @KiwiNom@KiwiNom3 жыл бұрын
    • It floats. Like a witch!

      @namewarvergeben@namewarvergeben3 жыл бұрын
    • @@namewarvergeben Floats upside down, like an Australian witch!

      @DrD0000M@DrD0000M3 жыл бұрын
    • But if you think about it some more, it stops making sense.

      @Mernom@Mernom3 жыл бұрын
    • Don't try to understand it, feel it.

      @TheAngelsHaveThePhoneBox@TheAngelsHaveThePhoneBox3 жыл бұрын
  • My mind has been blown by your last few videos! Keep it up!

    @heathispieces@heathispieces3 жыл бұрын
  • I love this awesome explanation! Taking "magic" and making it seem obvious and intuitive! Thank you for this!

    @philipmcbride3900@philipmcbride39004 ай бұрын
  • 9:00 When you're talking about forces at play, I think you're also forgetting atmospheric pressure. The air trapped beneath the silicone is also oscillating up and down at the same rate trapping the liquid additionally. This also would be part of the effect for the upside down boat.

    @Scott_C@Scott_C3 жыл бұрын
    • 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@T3sl43 жыл бұрын
    • @@T3sl4 there wouldn't be air to levitate on in a vacuum

      @anderpanders6210@anderpanders62103 жыл бұрын
    • @@anderpanders6210 I know that's what I said

      @T3sl4@T3sl43 жыл бұрын
    • @@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@anderpanders62103 жыл бұрын
    • @@anderpanders6210 You could use gasses of different density and viscosity, but it probably wouldn't look as impressive.

      @davidwuhrer6704@davidwuhrer67043 жыл бұрын
  • 10:05 "Immersed" or "semi-immersed" might be a suitable alternative for the situation. It evades the up-down connotation of "sub-".

    @christian-g@christian-g3 жыл бұрын
    • Finally someone who used an existing word

      @feha92@feha923 жыл бұрын
    • Or alternatively you could fully lean into it and call it "upmerged"

      @maxritter7868@maxritter7868 Жыл бұрын
  • Saw the title and thumbnail but passed on the video cause I never get any good info out of these kind and it's a waste of time, but then as I scrolled I saw it was Mould and raced back to watch it cause I can trust the quality in your work

    @iplay9s@iplay9s Жыл бұрын
  • Why have I not seen this channel before? I need to binge these videos next weekend. Fascinating content!

    @reeeil@reeeil3 жыл бұрын
  • 1:03 holding jar, hand and camera upside down. Genius

    @Terrain239@Terrain2393 жыл бұрын
    • Orrr he's just vibrating his hand with 120Hz frequency

      @rensvanbreukelen3762@rensvanbreukelen37622 жыл бұрын
  • 10:07 the word you’re looking for is “supermerged.” i may have made it up but it definitely works here

    @pierson9728@pierson97283 жыл бұрын
    • Not to be mixed with suppermerged which is when you’re overworked and your head ends up merging into your supper.

      @ArnaudMEURET@ArnaudMEURET3 жыл бұрын
  • You do an amazing job about a explaining things by introducing base concepts that can be understood and then building on those explain the more complicated phenomena.

    @parmesanzero7678@parmesanzero76789 ай бұрын
  • This is the most fascinating think I've finally gone back into my Watch Later playlist and watched.

    @doommuffinz5276@doommuffinz5276 Жыл бұрын
  • “If you want to find the secrets of the universe, think in terms of energy, frequency and vibration.” Nikola Tesla anytime you want to "defy" physics try vibrating it really hard, it might just work

    @dle511@dle5113 жыл бұрын
    • If you could vibrate individual atoms in solids, you could cause "spontaneous" combustion. Learned this from a movie, not from school.

      @ChasenR@ChasenR3 жыл бұрын
    • Time to buy a thousand vibrators

      @conditionalbee9603@conditionalbee96033 жыл бұрын
    • String theory. Yea.

      @RSAgility@RSAgility3 жыл бұрын
    • @@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.

      @Destroier534@Destroier5343 жыл бұрын
    • I am fixing my car light and TV this way

      @pawelmiechowiecki7901@pawelmiechowiecki79012 жыл бұрын
  • I LOVE this video. A few weeks ago I read the article that you referenced at the beginning, and I couldn't quite wrap my head around it. Your explanation and the scientists' video footage really make this whole concept much clearer. Thanks Steve!!!

    @jabekens@jabekens3 жыл бұрын
  • I just discovered your channel and I’m really impressed by the production quality, especially given this channel isn’t even about cameras and stuff like that. 60fps is cool, ur using an “edge light” and a fast aperture lens, like daaaam bro

    @bleuebloom@bleuebloom3 жыл бұрын
  • What a great analogy again! Thank you for the video!

    @jannehuhtala@jannehuhtala3 жыл бұрын
  • Awesome! *thinking of applications* I know - I'll hide my valuables in an opaque honey jar underneath a floating layer of honey! No one will think to look under the violently shaking honey jar! Now I just need to devise a bottom hatch that can open and close while the jar is shaking so that I can store and retrieve things without them getting sticky...

    @grantfhay@grantfhay3 жыл бұрын
  • I saw that levitating liquid and inverted bouyancy video but wasn't able to wrap my head around it,you made it pretty clear. Though I do not understand the whole process but the explanation you provided made intuitive sense. Great work.👍

    @shashanksinha324@shashanksinha3243 жыл бұрын
  • excellent pendulum explanation on the table

    @AlexMoreno-zj7po@AlexMoreno-zj7po3 жыл бұрын
  • Great video and something I've never seen before. Truly amazing content.

    @silvenshadow@silvenshadow3 жыл бұрын
  • 8:40 ventriloquism! I love your videos! Also their fixes :D

    @R2D2internet@R2D2internet3 жыл бұрын
  • 11:00 That there is youtuber speak for "I'm not one of the six people on the planet who understands this phenomenon well enough to explain it so let's not"

    @ummdustry5718@ummdustry57183 жыл бұрын
    • @@Clifford_Banes What's his main quest?

      @anderpanders6210@anderpanders62103 жыл бұрын
    • 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@grebe23323 жыл бұрын
    • @@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.)

      @davidwuhrer6704@davidwuhrer67043 жыл бұрын
    • @@anderpanders6210 @Valentin main quest is clearly comedian with Matt Parker

      @jakemcmillian@jakemcmillian3 жыл бұрын
    • @@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.

      @xponen@xponen3 жыл бұрын
  • You are fantastic at explaining things and this is crazy stuff god bless Steve Mould

    @thedoubster@thedoubster3 жыл бұрын
  • Your explanations are incredible. Thank you!

    @danielorta8563@danielorta85633 жыл бұрын
  • Another great video! I think the fact that this material has friction with the sides of the container the reason why the gravity correlation works in this explanation. I don't think the explanation holds in a frictionless environment, nothing to give a counteracting force for the "flattening" and it is what is allowing the drag on the upward movement.

    @christopherconroy2805@christopherconroy28053 жыл бұрын
    • I'm sure it would work better in a frictionless environment, as long as cohesion is still a thing.

      @davidwuhrer6704@davidwuhrer67043 жыл бұрын
  • Awesome explanation, 3rd year physics undergrad here and always love watching your videos. Don’t suppose you’d do one on complex networks? (My dissertations on it haha)

    @generalpartridge7653@generalpartridge76533 жыл бұрын
  • Sir your videos inspire us to learn more about the world around us and question the curious phenomenon around us for those of us whose parents didn't went to university you inspired us to take action by these different content thank you

    @shreyasp3287@shreyasp32873 жыл бұрын
  • It's been a very long time since i've seen such an interesting video... Thank you.

    @nikosrouselis2317@nikosrouselis23173 жыл бұрын
  • 8:38 I thought my eyes were temporarily filming at a slower frame rate 😛

    @Anton-cv2ti@Anton-cv2ti3 жыл бұрын
  • I came here with one question: "What is silicone oil?" I leave with an unanswered question and a new one: _"What the [redacted]?"_

    @AaronMeighoo@AaronMeighoo3 жыл бұрын
    • Scp

      @thegoodlistenerslistenwell2646@thegoodlistenerslistenwell26463 жыл бұрын
    • Reverse buoyancy should be an SCP thing

      @cezarcatalin1406@cezarcatalin14063 жыл бұрын
    • en.wikipedia.org/wiki/Silicone_oil

      @750kv8@750kv83 жыл бұрын
    • It's something that plastic surgeons sell to women for $5,000. Fully installed...

      @thePronto@thePronto3 жыл бұрын
    • @@thePronto - Now that's some scientific explanation right there.

      @750kv8@750kv83 жыл бұрын
  • Very cool video! Also interesting is seeing the liquid drip from that upside down boat, sort of escaping the tension through that pointy bit on the top!

    @Uncrastinating@Uncrastinating3 жыл бұрын
  • Wow. That was a great video Steve Mould

    @chichcnc@chichcnc3 жыл бұрын
  • I think it's awesome when scientists do things like make their buoyancy test items look like tiny boats. Makes you think they're enjoying their work 👍

    @lateoclock4281@lateoclock42813 жыл бұрын
  • Submerged upside down - could it be “supermerged”?

    @Gusto20000@Gusto200003 жыл бұрын
  • Thanks for this great video. I like your intuitive approach to explain the stability of the vibrating inverted pendulum. You can even explain the stability of the vibrating inverted pendulum without mentioning forces and vectors (which is already quite advanced for children in elementary school) When pulling the rod, it acts as a hanging pendulum. When pushing the rod, it behaves like an inverted pendulum. The time it takes from a perturbed pendulum to move towards it's equilibrium point is much shorter than the time it takes for an inverted pendulum to move from it's equilibrium position towards a small displaced position. It's not as accurate, since it's a little more complicated than that, but it's even more intuitive.

    @wesleyooms@wesleyooms3 жыл бұрын
  • This is especially fascinating to me for a very different reason, during my astronomy major the most interesting question I ever got was to model a harmonic oscillator of a displaced piston compressing an ideal gas, as a way to think about variable stars. And now here it is in the real!

    @MoldySpace@MoldySpace2 жыл бұрын
  • 10:04 I think the word you're grasping for is "supermerged"

    @zedfalcon6972@zedfalcon69723 жыл бұрын
    • @Evi1M4chine precisely

      @zedfalcon6972@zedfalcon69723 жыл бұрын
  • I love your philosophy of finding an intuitive explanation. Knowing how something works makes it easier to do the math, but knowing the math really doesn't do much to help you understand what's going on. I'm a little surprised they had you write a question and you didn't do "What is the most interesting thing to pour out of a beaker?" ;)

    @coryman125@coryman1253 жыл бұрын
  • Astonishing ! If it weren’t your video and explanations I’d be suspicious. Great vid as usual ! 🙏🏻

    @anonymous.youtuber@anonymous.youtuber3 жыл бұрын
  • I went into this video certain I would never understand what was happening but interested in seeing the cool visuals, but the explanation about vibrating pendulums made it so clear I felt my brain grow.

    @josephgeidel3507@josephgeidel35072 жыл бұрын
  • 6:32 I did not understand why this is at first: while the pivot point is pushing up, the rod goes from close to vertical to far from vertical, and while the pivot pulls down, the rod goes from far away from vertical to close to vertical again, so it seems to average out and the forces cancel. It turns out that I was confused by the model with the table where friction played a role as well. The force that pushes the rod away from vertical position is caused by the acceleration (not velocity) of the pivot point upwards, so it occurs mostly when the pivot is at the lowest position, so when the rod is closest to the vertical position, which is exactly what you said :)

    @jovangerbscheid4619@jovangerbscheid46193 жыл бұрын
  • "To qualify to enter this competition you must be resident in the United Kingdom and aged over 18 years." *Sad Czech noises.*

    @SmileyFace01@SmileyFace013 жыл бұрын
    • @Evi1M4chine wut?

      @SmileyFace01@SmileyFace013 жыл бұрын
    • @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)

      @nahometesfay1112@nahometesfay11123 жыл бұрын
    • Sorry sir, your application is invalid because you did not czech the UK resident box.

      @markp5726@markp57263 жыл бұрын
    • :^)

      @SmileyFace01@SmileyFace013 жыл бұрын
    • @@markp5726 good one mike

      @barakathiongo4835@barakathiongo48353 жыл бұрын
  • This was absolutely fascinating

    @bscutajar@bscutajar Жыл бұрын
  • Smashed it again Steve.

    @stephenstreet1045@stephenstreet10453 жыл бұрын
  • 4:20 I want this as an XXL version so that I could dive in it until I dived through the first one and jump into the second one 😊 It reminded me of a part in the movie "A world beyond", when they swam in a levitating water bubble. 10:28 How would it feel to just hold out the head (like the upside down boat) and still don't falling down. 😅

    @photelegy@photelegy3 жыл бұрын
    • While being violently shaken up and down

      @vibaj16@vibaj16 Жыл бұрын
    • That would be fun, but it might colapse then.

      @yvesstocky9936@yvesstocky9936 Жыл бұрын
    • Shaken swimmer syndrome... lmao

      @toadamine@toadamine Жыл бұрын
  • 5:10 it's not what you think mom! I can explain this is an upside down pendulum

    @pooyataleb2514@pooyataleb25143 жыл бұрын
  • Man, you're so good at communicating science.

    @b33thr33kay@b33thr33kay3 жыл бұрын
  • Yeh m8. Very knowledgeable.. 1st time watcher and impressed.

    @animalbird9436@animalbird94362 жыл бұрын
  • The inverted boat broke my brain. :(

    @johnchessant3012@johnchessant30123 жыл бұрын
    • Windows blue screen intensifies.

      @cezarcatalin1406@cezarcatalin14063 жыл бұрын
    • 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.

      @xponen@xponen3 жыл бұрын
    • Sorry

      @Rabbit-the-One@Rabbit-the-One3 жыл бұрын
    • @@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@fewwiggle3 жыл бұрын
    • @@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.

      @xponen@xponen3 жыл бұрын
  • 10:05 Supermerged?

    @TheWolfboy180@TheWolfboy1803 жыл бұрын
  • This explains a lot of things for me! Thank you!♥️👍🌟

    @SkyraHope@SkyraHope3 жыл бұрын
  • Physics just never ceasees to amaze me!

    @krystofbohac5313@krystofbohac53133 жыл бұрын
  • "If you think about it some more..." and some more and some more.... This is why we have some very indecisive people! Actually, on second thought, maybe it's not.... ...Or IS it?

    @HelloKittyFanMan.@HelloKittyFanMan.3 жыл бұрын
    • Wa wa waaa... @Evi1M4chine couldn't get my JOKE!

      @HelloKittyFanMan.@HelloKittyFanMan.3 жыл бұрын
  • I can't wait to create precarious equilibrium with honey every time I use it now!

    @defalt2900@defalt29003 жыл бұрын
  • Steve, you're awesome.

    @combos16@combos163 жыл бұрын
  • That was such a good explanation

    @grazedrightbeef8921@grazedrightbeef89213 жыл бұрын
  • I think where is a typo in the thumbnail 😅

    @faxezu@faxezu3 жыл бұрын
    • There's a typo in your comment though.

      @shanonfrancis5071@shanonfrancis50713 жыл бұрын
    • is there? which?

      @georgplaz@georgplaz3 жыл бұрын
    • @@georgplaz silicon was written Silocon.

      @faxezu@faxezu3 жыл бұрын
    • @@shanonfrancis5071 I have an extra w if you want to buy it 😁

      @faxezu@faxezu3 жыл бұрын
  • 9:46 Are serious mr Mould? 😂 Reverse-buoyancy?! 2020 cannot ever surprise me, but turns out you still can! 🤣

    @Ecktor@Ecktor3 жыл бұрын
    • 2020 can’t surprise you ? Ha ! I bet you aren’t prepared for the Christmas surprise !

      @cezarcatalin1406@cezarcatalin14063 жыл бұрын
  • The last part where the boats seem to float up-side down really looks like a nice segway to gravitational fields. I look forward to your videos!

    @matteo234321@matteo2343213 жыл бұрын
  • impressive content with simple explanation

    @kamilcnar4551@kamilcnar45513 жыл бұрын
  • I was just watching a video yesterday from Cody’s Lab about floating a liquid on a gas (gallium on xenon I think). Weird timing.

    @radicalxedward8047@radicalxedward80473 жыл бұрын
  • So, effectively, "How to film the upside-down boat scene from Pirates of the Caribbean."

    @loganstrong5426@loganstrong54263 жыл бұрын
  • This just blew my mind when it clicked in my head. That’s just... i loved this

    @blaineburgess@blaineburgess3 жыл бұрын
  • Very good presentation. Some vloggers think you need background music (in the foreground) or elevated playback speed to demonstrate the laws of physics. These videos of yours are a delight. Thank you!

    @jlinkels@jlinkels3 жыл бұрын
  • I hate silo cons. They don’t install the proper safety systems for grain storage.

    @2nd-place@2nd-place3 жыл бұрын
    • the grains always so wet and it molds and rots.

      @Theinatoriinator@Theinatoriinator3 жыл бұрын
    • 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

      @ericl8743@ericl87433 жыл бұрын
    • 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

      @ericl8743@ericl87433 жыл бұрын
  • 05:08 I will not ask what else you use that thing for...

    @NicklasUlvnas@NicklasUlvnas3 жыл бұрын
  • Nice effect that's surprisingly easy to intuitively understand

    @Moonfrog11@Moonfrog113 жыл бұрын
  • This video is both mind-blowing and so so relaxing xD

    @siepkevankeulen@siepkevankeulen3 жыл бұрын
  • 8:40 Your voice says liquid, your mouth says water. Noice dub.

    @djdrav@djdrav3 жыл бұрын
  • So basically, whenever you have a system where the forces are dependent on position you can always flip the stability of the system? Can anyone come up with a counter example to this? Has this statement been proven in general? *Picks up pen and paper, starts chewing on the pen hoping it will do something*

    @beaconofwierd1883@beaconofwierd18833 жыл бұрын
    • Evi1M4chine No, as in ”Magical mathematics certified-by-physics-of-reality axiom land”, also known as regular physics.

      @beaconofwierd1883@beaconofwierd18833 жыл бұрын
  • Thank you Steve, I'm guessing this is the final key to my perpetual motion machine.

    @omshakal@omshakal2 жыл бұрын
  • Mind blown! Thank you!

    @pavaomarusic6051@pavaomarusic60513 жыл бұрын
  • 5:53 [Matt Parker wants to know your location]

    @U014B@U014B3 жыл бұрын
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