"Super-Kamiokande" remains the best name for anything ever
Physics Girl: Super-Kamiokande – Imaging the sun by detecting neutrinos [video]
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Re: Physics Girl: Super-Kamiokande – Imaging the sun by detecting neutrinos [video]
#92Earlier quoted context omitted.
I found the article I was trying to remember: https://www.businessinsider.com/super-kamiokande-neutrino-de...
> when travelling through water, neutrinos are faster than light Interesting, how could this be possible?
[I was going to write an explanation, but these sentences of Wikipedia article ar better.] From https://en.wikipedia.org/wiki/Super-Kamiokande
> A neutrino interaction with the electrons or nuclei of water can produce a charged particle that moves faster than the speed of light in water, which is slower than the speed of light in vacuum. This creates a cone of light known as Cherenkov radiation, which is the optical equivalent to a sonic boom. The Cherenkov light is projected as a ring on the wall of the detector and recorded by the PMTs.
Re: Physics Girl: Super-Kamiokande – Imaging the sun by detecting neutrinos [video]
#93How much of the mass of the universe is neutrinos?
Nobody knows for sure.
The uncertainties about the masses of the various kinds of neutrinos are very high.
Also their abundance in the Universe is much less accurately known than for electrons and nucleons, because many processes generate neutrinos or antineutrinos and only few of those are absorbed in later collisions, so the total amount of neutrinos and antineutrinos is increasing continuously, even if the difference between the number of neutrinos and antineutrinos varies only little.
For the mass of nucleons and electrons one can make reasonable estimates, even if the uncertainties about the densities of interstellar and intergalactic matter are also very high. On the other hand, for the mass of neutrinos + antineutrinos the uncertainties encompass many orders of magnitude.
The detectors of neutrinos can detect only high-energy neutrinos. There may be much more undetectable low-energy neutrinos.
Re: Physics Girl: Super-Kamiokande – Imaging the sun by detecting neutrinos [video]
#94Dianna got better sometime last year as well, just in time to fly home to Hawaii for her father's funeral (yeah ...), but she got a lot worse again later. I really hope things will keep going well for Dianna now. Props for her husband who's been incredible of taking care of her.
This is the nature of ME/CFS (caused by Covid or otherwise), it does vary somewhat over time although the course is not always to improvement or around the same level but sometimes to death. She received some form of experimental treatments in order to gain the prior recovery which was at least a stellate ganglion block, she has not mentioned what else she may have received. Hopefully she maintains a higher baseline…
>"Otherwise"
Would could this possibly be referring to?
Re: Physics Girl: Super-Kamiokande – Imaging the sun by detecting neutrinos [video]
#95Is this long Covid or depression or Major Depressive Disorder (MDD)? Because in her earlier videos she talks about becoming bed-bound again due to her emotional state after finding news her friend who had a similar condition died.
Long Covid and ME/CFS can make you fragile. At least it has for me. I never used to get emotionally overwhelmed, now I do. I don't have it as bad as she does, but I've been bedbound because of this. And being sick for months to years, already leaves you feeling on the brink of depression.
Re: Physics Girl: Super-Kamiokande – Imaging the sun by detecting neutrinos [video]
#96Earlier quoted context omitted.
This is the nature of ME/CFS (caused by Covid or otherwise), it does vary somewhat over time although the course is not always to improvement or around the same level but sometimes to death. She received some form of experimental treatments in order to gain the prior recovery which was at least a stellate ganglion block, she has not mentioned what else she may have received. Hopefully she maintains a higher baseline…
>"Otherwise" Would could this possibly be referring to?
Epstein-Barr virus (EBV), unknown genetic conditions or other unknown stressors.
Re: Physics Girl: Super-Kamiokande – Imaging the sun by detecting neutrinos [video]
#97Earlier quoted context omitted.
Water is a solvent. Not sure where you get that it's not. From the closing of the first graph in the Wiki for water: Due to its presence in all organisms, its chemical stability, its worldwide abundance, and its strong polarity relative to its small molecular size, water is often referred to as the "universal solvent" https://en.wikipedia.org/wiki/Water Edit: after enough searching I was finally able to find this art…
You misread what I wrote. Water is the same solvent as both regular water and ultrapure, I was replying to the ultrapure part. Also: I appreciate you found a source, unfortunately it's not true what they said. It's not possible to "leech nutrients through the hair to the scalp", the wrench story is not true either - there is zero chance a lab with the standards they have would just leave a wrench at the bottom of the…
I think people might be confusing ultra-pure water with "DI water" (deionized water).
DI water is AN AMAZING SOLVENT. Waaay more powerful at dissolving low-solubility solids than tap water, or even distilled water. It's stunning IRL to see how much better it cleans optical surfaces, where single-molecule layers can visibly change the appearance.
But if left open to the atmosphere, as in these pools, it would soon be just plain old (pure) water. Ultra-clean, but not an ultra-solvent.
Re: Physics Girl: Super-Kamiokande – Imaging the sun by detecting neutrinos [video]
#98Earlier quoted context omitted.
This is the nature of ME/CFS (caused by Covid or otherwise), it does vary somewhat over time although the course is not always to improvement or around the same level but sometimes to death. She received some form of experimental treatments in order to gain the prior recovery which was at least a stellate ganglion block, she has not mentioned what else she may have received. Hopefully she maintains a higher baseline…
>"Otherwise" Would could this possibly be referring to?
[deleted]
Re: Physics Girl: Super-Kamiokande – Imaging the sun by detecting neutrinos [video]
#99How much of the mass of the universe is neutrinos?
Nobody knows for sure. The uncertainties about the masses of the various kinds of neutrinos are very high. Also their abundance in the Universe is much less accurately known than for electrons and nucleons, because many processes generate neutrinos or antineutrinos and only few of those are absorbed in later collisions, so the total amount of neutrinos and antineutrinos is increasing continuously, even if the differe…
When I tried to look myself it was about this waffly but I’d also note that they were all talking about neutrinos at rest. But they’re wizzing around at relativistic speeds which makes them all many times heavier doesn’t it?
Between things like black holes and neutrinos I wonder how much Dark Matter will end up being dark matter. And I think the cosmological crisis indicates we are measuring space curvature wrong somehow.
Like neutrinos interact with gravity, which means they can be lensed, and ejected from pulsar and black hole jets. And particles moving faster than visible matter would pass that matter and accelerate it, increasing blue shift and decreasing red shift the farther you are from the source.
Re: Physics Girl: Super-Kamiokande – Imaging the sun by detecting neutrinos [video]
#100Earlier quoted context omitted.
> when travelling through water, neutrinos are faster than light Interesting, how could this be possible?
I didn't read the article, but it's likely they are faster than light is when traveling through that water. light can have different speeds through different media. for charged particles (so not for neutrinos) this leads the Cherenkov radiation, often observed in the cores of nuclear reactor: https://en.wikipedia.org/wiki/Cherenkov_radiation as to why in this case: it can be somewhat intuitive to think that photons w…
This is the way: faster than the local speed of light in water.