3 ms·
It didn’t pin, it bounces, if it was flux pinning it would not bounce when you push it down.
by m3kw9 3y ago
It didn’t pin, it bounces, if it was flux pinning it would not bounce when you push it down.
- jack_riminton 3y agoFlux pinning doesn’t mean it can withstand all forces it just means it will return to where it was
- traverseda 3y agoWhat about those Flux pinned maglev "trains" you see on YouTube?
- mcpackieh 3y agoWhat do you mean "what about?" them? Can you post a video of any of those that don't jiggle when poked?
- XorNot 3y agoThe idea of those (i.e. like this https://www.youtube.com/watch?v=AWojYBhvfjM&vl=en https://www.youtube.com/watch?v=AWojYBhvfjM&vl=en) is that they're an example of equi-potential behavior. The superconductor can move because it's staying at a consistent height. The video linked is also pretty good at showing similar behaviors to the sample of LK99 we see claimed in the video: the superconductor can wobble, shake and does return to it's original position (or tries to) - but it's got a lot more mass.
- jacquesm 3y agoAnd when you change the mass of the train the height of levitation changes.
- traverseda 3y agoYeah, it's jumping back to a fixed position which isn't how I thought the Meissner effect worked. Since this seems to be posted by someone reputable though it's weird they missed that.
- bobbylarrybobby 3y agoFlux pinning is distinct from the Meissner effect
- frankreyes 3y agoNileRed at 32:30. https://youtu.be/RS7gyZJg5nc https://youtu.be/RS7gyZJg5nc
- kochie 3y agoThat's not true. Here's a video from a few years ago [showing a superconductor flux pinning](https://www.youtube.com/watch?v=OSojjjvRCR0 https://www.youtube.com/watch?v=OSojjjvRCR0). You can see from the video it's moving around. Also if it didn't move when you applied a force to it that would be quite the immovable object.
- cbolton 3y agoAnother one that looks quite like the behavior shown here: https://www.youtube.com/watch?v=R2Hy6F_8n58 https://www.youtube.com/watch?v=R2Hy6F_8n58
- m3kw9 3y agoOk my bad
- frankreyes 3y agoNot true. NileRed shows it at 32:30 https://youtu.be/RS7gyZJg5nc https://youtu.be/RS7gyZJg5nc That's how a levitating train levitates.
- phist_mcgee 3y agoIf no one has ever seen NileRed's video before, check out some of his popular videos on practical organic chemsitry. Things like making hot sauce from latex gloves, or turning toilet paper into high proof alcohol. He's a fantastic no-nonsense youtuber.