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Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2

arxiv.org

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Re: Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2

#191

Post by geuis »

est wrote: post #23

https://www.bilibili.com/video/BV14p4y1V7kS/ Latest update: the diamagnetism has been confirmed from a tiny LK-99 replica sample. The Author posted: > Under the guidance of Professor Haixin Chang, postdoctor Hao Wu and PhD student Li Yang from the School of Materials Science and Technology of Huazhong University of Science and Technology successfully for the first time verified the LK-99 crystal that can be magnetica…

How anyone can see anything in the video is beyond me. Just dozens of comments literally flying across the video.

Re: Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2

#192

Post by superluserdo »

MagicMoonlight wrote: post #42
brunooliv wrote: post #12

What are the implications in general of room temperature superconductors? I just know that they needed typically ultra low temperatures right? But what would be the practical implications?

Anything that uses electricity would use less electricity because you aren’t wasting it as heat. So in theory you could have a ridiculous computer that runs 1000GW of power through it without heating up. Or a flying car. Or power cables that lose nothing during travel. Naturally that’s why it doesn’t make sense. It’s too game-breaking to be possible in normal conditions. Glitching something out by making it basically…

>So in theory you could have a ridiculous computer that runs 1000GW of power through it without heating up.

That doesn't make sense. Power has to be consumed by something. All energy ends up as heat, so if the computer isn't heating up then the power consumption is 0W, not 1000GW.

>Or a flying car.

A flying car with superconducting motors would still have to expend the energy to stay aloft by pushing air downwards. Even without thermal losses to electrical resistance, you'd still have losses to friction from the moving components.

Re: Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2

#193

Post by ajuc »

tdehnel wrote: post #152
ajuc wrote: post #149

Earlier quoted context omitted.

Because he already has a sample and it doesn't hurt to check other properties of it.

Which properties to check? Why that sample and not countless others? Why not spend the rest of his life checking different properties of the one sample?

Whatever suits your fancy.

> Why not spend the rest of his life checking different properties of the one sample?

The material in question is called LK-99 because it was first produced in 1999. Why not, indeed :) ?

Re: Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2

#194

Post by beowulfey »

Knee_Pain wrote: post #189
beowulfey wrote: post #174

Earlier quoted context omitted.

Imagine you have dreamed of some new discovery your whole life. Let's say you are convinced that, I don't know, there exists in the world a naturally bright pink species of cat. You study cats; you know their behaviors, and can guess at the means of finding this elusive pink jungle cat. You search for years to no avail... when suddenly, without prior warning you are on vacation in some remote island and hear a rumor.…

My iPhone can take stunning videos. This is not 2010 anymore

Congratulations on owning an iPhone! (I do too, they’re great.) But I want to emphasize that the quality of the phone camera was not the point of that story.

Re: Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2

#195

Post by XCSme »

asimpletune wrote: post #68
bibabaloo wrote: post #15

Earlier quoted context omitted.

This thread covers some: https://twitter.com/Andercot/status/1685088625187495936

The battery one is crazy, where you just store the electrons in a loop.

But how do you get them out? Don't electrons prefer the path of least resistance, so that is staying in the superconductor? Or they won't stand still?

Re: Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2

#196

Post by in_a_hole »

maebert wrote: post #67
ajb117 wrote: post #55

I don't know much physics, but is there a reason we should be hoping for superconductivity specifically rather than a cheap material that's just a very very good conductor? Also, even if LK-99 were superconductive, that wouldn't imply it would be useful for computing, right? Surely there are materials that are better conductors than silicon but have mechanical and other physical quirks preventing us from using then f…

A few practical things that we need superconductors for which currently require very expensive cooling: 1) MRIs — could be way cheaper, smaller and more ubiquitous with room temperature superconductors 2) Maglev trains — superconducters expel a magnetic fields that can make things "levitate" (called the Meissner effect). Maglev trains have minimal friction and are incredibly energy-efficient. 3) Quantum computing — m…

[dead]

Re: Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2

#197

Post by DonHopkins »

xNeil wrote: post #176
realjhol wrote: post #164

Earlier quoted context omitted.

I'm not hearing much argument for why I might be wrong, other than pearl clutching, tone policing and guilt by association

All of a sudden it seems the commenters have started name-calling and stereotyping the poster (realjhol) without any evidence or links to dispute his statements. Maybe replying in good faith would be a more helpful discussion, with links to support/deny his arguments?

I've read his posting history. It's quite clear what kind of a person he is, especially from the patterns and subjects of all his heavily downvoted and flagged posts. As if that wasn't already obvious from his recent sexist posts. But go read them yourself and carry the water for his bigotry if you like, it'll just say a lot about yourself too. Like Elon Musk and his flashing "X", some people just desperately want you to know they're assholes.

Re: Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2

#198

Post by LordHeini »

dtx1 wrote: post #171

Theoretically, could/should we use these for signalling as well? Small strands of superconducting wire instead of fiberglass?

Sure it would work like copper wire minus the losses due to resistance.

Probably it would not make much sense to replace glass fiber because problems like (thermal) noise and cross contamination by other signals would still exist.

Re: Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2

#199

Post by ProtoAES256 »

yorwba wrote: post #188
ProtoAES256 wrote: post #128

Earlier quoted context omitted.

He repeatedly stated that the sample stands up(become straight) when the object is nearing it, and drop down when its far. The same applies for the negative polarity(same behaviour on N/S). Source: Native Mandarin speaker.

Did you understand what he said when he explained what kind of magnet he used? Different versions produced by targum claim either "aluminum shed magnet" https://targum.video/v/2023/8/1/e2ad3b8e86961ccfdcf411d2d4d1... or "cast iron shed magnet" https://targum.video/v/2023/8/1/2534a4408ccce9c13a811e94f16d...

钕铁硼磁铁，Neodymium magnet

Slight chance that might be wrong, their northern accent is too strong.

Re: Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2

#200

Post by ly3xqhl8g9 »

realjhol wrote: post #162
ly3xqhl8g9 wrote: post #138

Earlier quoted context omitted.

[flagged]

What isn't true? Is both the average and the variance of IQ in men/women identically equal? Why would we even expect it to be? Is the likelihood of risk taking behaviour identically equal between men/women? Why would we even expect it to be? Is the likelihood that a man/women will be identically equally interested in a career in the hard sciences? Why would we even expect it to be?

[flagged]
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