Successful room temperature ambient-pressure magnetic levitation of LK-99

Post by digbybk » Fri, Aug 04, 2023, 4:13 PM UTC

anigbrowl wrote: post #781

softwaredoug wrote: post #705

I no nothing about superconductors. And have been largely ignoring this until it seemed more certain. Can someone ELI5 why this matters? What does it enable technologically? Flying cars? Fusion reactors? Magic fix for global warming?

Conventional conductors have resistance, so when you run electrical current through them they heat up; this is why laptops and desktops have fans to cool the chips, why phones get hot and so on. Superconductors transmit energy without resistance, so the heating problem goes away and the energy costs of running the device go way, way down. Basically you can pump more through smaller wires without worrying about them m…

Post by smallnix » Fri, Aug 04, 2023, 4:16 PM UTC

jacquesm wrote: post #780

dmix wrote: post #771

Earlier quoted context omitted.

What personal benefit does this gain someone to publish it so quickly? Is it just social media attention?

There are no prizes for being second in science.

Post by wruza » Fri, Aug 04, 2023, 4:20 PM UTC

wittenbunk wrote: post #803

eggy wrote: post #796

Earlier quoted context omitted.

I agree, it could use more of the easy details, however, I don't have much issue with 10^-2 Pa, since standard atmospheric pressure is 101,325 Pa, so 0.1 Pa (10^-2 Pa, or 1.45x10^-6 psi) is definitely understood as a vacuum, but you're correct, why not just add "vacuum" for thoroughness. I know mercury gauges use to have a 0 to 30 scale sometimes (not 0 to -30), and that was confusing!

10^-2 is 0.01

Post by zhynn » Fri, Aug 04, 2023, 4:29 PM UTC

dmix wrote: post #771

mk_stjames wrote: post #735

This is obviously a quickly produced paper to get the finding out but.... I find there to be so much missing and so many things poorly worded or posed about their process that would have taken zero time to expound upon, it's infuriating. "All the reactions are carried out under 10^-2 Pa" OK, I know they mean 10^-2 of vacuum. But why not say that? "10^-2 Pa" isn't enough. Was this a full vacuum oven? Done in sealed qu…

What personal benefit does this gain someone to publish it so quickly? Is it just social media attention?

Post by rvcdbn » Fri, Aug 04, 2023, 4:34 PM UTC

marcosdumay wrote: post #811

rvcdbn wrote: post #333

Earlier quoted context omitted.

There is an anthropic line of reasoning over Everettian branch universes where you can actually expect these types of highly unlikely events to happen more often than chance alone would predict if they promote futures with more Born-rule weighted observer-moments.

Just to add on the "nonsense" line. Using the antropic principle to talk about the future is completely absurd. There is a huge amount of what I think in unawarded debate about applying it to the past (IMO, it's very clear where it should be used), but applying it to the future is completely against any kind of logic.