The Levitating Liquid Pendulum
1,394,235
Published 2020-10-08
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 stroboscopic effect
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/InvPendulumPTSE.pdf
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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All Comments (21)
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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!
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Finally. I've always wanted to levitate some silicone oil but was never quite sure how to achieve it.
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Ohhh, so that's why Australian boats don't fall off the Earth.
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"Inverted buoyancy" is definitely a high school project winner. Looks so simple, yet so unreal.
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This upside down buoyancy is the most incredibly interesting thing I have seen in a long time!
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"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
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"Dear, why is honey and 120 Hz Vibration generator on the shopping list?"
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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!
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"Here is my vibration generator" Okay, Steve.
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9:50 but in the end, the making sense of the problem averages out until there is a stable making of sense.
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8:40 You originally said "body of water", didn't you. I almost didn't notice the overdub, that was really well done.
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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
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1:51 Ah! I see the scientist is a man of culture as well.
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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."
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The "Inverted Buoyancy" part of this should probably be mentioned in the title. I would watch a whole video only about that!
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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!
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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!
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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..."
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Scientist: Are you stable? Viscous liquid: Well yes, but actually no
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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
