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John Cuthber

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Everything posted by John Cuthber

  1. The Raman effect is not reflection. That image is neither a reflection, nor a Raman image. It's not clear that you have enough understanding to ask good questions here. YT videos can be a great way to learn stuff, or they can be so "dumbed down" as to be useless. You probably need to expand your list of sources.
  2. For those who aren't aware of it... https://en.wikipedia.org/wiki/CRC_Handbook_of_Chemistry_and_Physics But, not every possible reaction is in there. So, fundamentally, if you produce (or find) a new compound, you might be able to guess it's properties but generally, you will have to measure them.
  3. Why not? The temperature dependence is usually quite strong; the pressure has less effect. Yes, but it won't help much because you need to know the energy change for the reaction. https://www.chem.purdue.edu/gchelp/howtosolveit/Thermodynamics/TemperatureDependanceOfK.html Pure HCl is a gas. The case of pure liquid acids like H2SO4 or HNO3 is complicated.
  4. How do you know it wasn't simply that your immune system did its job? Dilute solutions of chlorine (prepared electrolytically or otherwise) are certainly antibacterial. So, nearly a million fold range of H+ concentration. Doesn't look like the sort of quality control I would like for a medical product.
  5. Not where I am. In the EU there's a limit of 200 mg/ l for sodium in drinking water. That's about 8 mMol per liter If you electrolytically exchanged all of that for H+ ions you would get a pH of about 2.1, so a pH of 2.4 means you are close to the limit for good drinking water. My tap water has about a tenth of that much- corresponding to a pH of about 3.1 Is there any evidence that it works?
  6. A matter of indifference to the agricultural community. How? Anyway, I'd avoid the use of hydrochloric acid; the chloride ion tends to build up in soil and "poison" the plants. If there was a "cheap" way to make, for example, sulphuric acid, then the people who make sulphuric acid would already be using it. So it's unlikely that you could make it much cheaper. I vaguely wonder what would happen if you mixed powdered pyrites into the soil. It might oxidise to sulphate (slowly) .An interesting experiment; but with no guarantee that it works or even that it's cheap.
  7. And for zinc- which is often used in school experiments on photoionisation, the reflectance drops like a rock in the UV region https://tubingchina.com/HDG-Hot-Dip-Galvanized-Surface-Reflectivity.htm
  8. Is not a common recipe
  9. As an anti-caking agent in salt. It's not the only one used. That's why I also motioned MgCO3
  10. Air is a good enough oxidant. I can imagine either magnesium carbonate or sodium ferrocyanide acting as a catalyst.
  11. I wouldn't like to have to rule out Cr(VI) as the cause of the yellow colour. How important is the beer?
  12. The biggest problem with a jar full of electrons is that they repel eachother and stick to practically anything.
  13. James Wimshurst would have laughed at you and installed a clockwork motor or a magnetic drive. I don't know about Wimshurst generators, but it is common for Van de Graaff generators to be run in pressure chambers. High pressure sulphur hexafluoride is used as an insulator. Unless your battery has something like ten thousand cells in series, that's a horribly inefficient set-up.
  14. I'd imagine you are right. But part of the problem is that Trump isn't interested in asking what they like; he's interested in telling them what he likes (or, at least pretends to like) So, he's the one telling them that they can't get a decent job because of immigrants. He's the one telling them they need to have more guns to stop shootings. He's the one telling that that the democrats would poison puppies at perverted orgies ... or whatever. While, in fact, it's the Republicans who seem to get found to be misbehaving. But the media is run by billionaires. Most of the folk voting for Trump do not realise that they don't have much in common with a so called "rich" businessman.
  15. Did you post a response?
  16. Fascinating. Can they do the same with other viruses like HIV? Probably a discussion that would warrant another thread.
  17. We hardly need to. The existence of a level 3 in between tells us that that what they were doing was nothing like what you would do if you were working on a bioweapon- as the daft conspiracies suggest. Any "gain of function" stuff would be BSL4. You seem to be missing my point; I'm not saying that the virus didn't "escape" from that lab. I'm saying that it was outside the lab before it went into the lab. And, because it was in the environment, the transfer to people and the growth to a pandemic was pretty much inevitable with or without the lab. It may well be that some of the first humans infected worked in that lab. But that's not the same as saying that they were, in any way, culpable beyond run of the mill ignorance. They were just monumentally unlucky. They were doing what they thought was BLS2 work in a BSL2 lab.
  18. There's no "could" about it. It does indicate substandard precautions. However, my point is that you can't do research on human pathogens without suitable precautions for long- because you die. Anyone involved in the field knows this. So the fact that they were not even wearing gloves shows that they did not think they were working with anything "nasty". So all the "gain of function" conspiracy theories are wrong.
  19. That's pretty close to proof that they were not working on"making" a virus that would affect people. The virus may have escaped from a lab,but it wasn't "engineered" there.
  20. Nor were the people of Germany in 1923- until it happened.
  21. That rules out the Dollar, the Euro and Sterling... and all the others.
  22. We are, pretty much, discussing the spherical cow in a vacuum here. Yes, in practice it wouldn't be perfect, but in principle, it works. Would it radiate? Would it "sort of radiate" because the normal BBR would be blue or red shifted, meaning that it would reflect more or less than would be "expected"?
  23. I'm fairly sure I could make a balloon out of conductive rubber and put a motorised pump inside it to move air in and out of a cylinder (also within the balloon). It's absurd, but not unphysical. As long as it stayed spherical, I can't see what polarisation any resulting radiation would have. That's going to make it hard to emit photons.
  24. They probably said that about paper money. That is Plan A.

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