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e.g. What keeps bicycles balanced with or without a rider is still an active area of research, and even the seemingly basic idea that, for a bicycle to be self-stable, it needs to turn the handlebars into the fall, has not yet been proven. [*] https://ciechanow.ski/bicycle/
"Active area of research" is quite different to "we don't know how they work". We know how they work. We might not have fully characterised the stability conditions , but that's not the same thing.
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It isn't. Permanent magnets would be unstable. This would have to be a diamagnetic or superconducting material.
It is, depending on how big the contact patch is. But does look pretty small in this video and it doesn't really behave like a permanent magnet would.
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> Has there been any commentary on that? German, but nevertheless: http://blog.fefe.de/?ts=9a3f8740 "I work in the field [...] we don't believe a word of this. [...] The data set in Fig. 4(b) is also a treat. It is VERY unusual when the heat capacity decreases again at high temperatures. This can happen at low temperatures, but not at high temperatures. [...] My personal assumption is that the authors measured an ins…
Wow, that's pretty damning. Good one.
But the papers don’t show that. There’s no obvious contradiction unless you make some big assumptions.
New scientist got a reply from the authors and a few other experts: https://www.newscientist.com/article/2384782-room-temperatur... >Kim has only co-authored one of the arXiv papers, while the other is authored by his colleagues at the Quantum Energy Research Centre in South Korea, some of whom also applied for a patent on LK-99 in August 2022. >Both papers present similar measurements, however Kim says that the seco…
I’m not a physicist expert of superconductors, although I’ve followed quite closely that field since the ‘90s. But if the measurements are similar and correct and if the video of lk-99 levitating above a magnet demonstrating the Meissner effect is not fake, I don’t really have an alternative explanation to account for all of that. I guess that we’ll see what happens in the next week or two. This is too high stakes to take longer than that for a so easily reproducible experiment.
"this stuff is claimed to superconduct all the way up to room temperature and indeed up past the boiling point of water. Its critical temperature is said to be 127C" Would this have implications about possible efficient methods of converting heat back into electricity? Or even just more ways of harnessing heat energy in general. I'm imagining heat pumps built with superconductors could be a critical part of mitigatin…
So what kinds of cool stuff could be built with a room temperature superconductor? Better levitating trains?
Nuclear fusion much easier, quantum computing, lossless electricity transmission, insane batteries. Dirt cheap MRIs, Basically welcome to the Jetsons. Much easier to mitigate climate change to the point where we can just deal with it.