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John Cuthber

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Everything posted by John Cuthber

  1. Over here they managed that by the simple expedient of giving lots of money to rich people.
  2. It's fake. Probably (as Sensei says) a laser since that's probably the easiest and cheapest way to do it.. Any chemical which could light a match at a distance of a few inches would destroy the paper on contact.
  3. Then, whatever you do, don't elect a Conservative. They got elected here in the UK on a ticket of "Paying down the debt". Since then, they have borrowed more than all Labour governments put together and the national debt has doubled.
  4. People tried. told them they were wrong. Then you told them that you were open minded. Great! Now looking forward to your evidence that we don't throw off practically all the pathogens we meet. Great! Still looking forward to your evidence that we don't throw off practically all the pathogens we meet. and so on.
  5. How will you know what is correct and what is incorrect? In general, we destroy them, rather than accumulating them. I do not still have all the colds or sore throats I ever caught. It's true that, for example, we never really get rid of some- like Measles- which is why it's very rare to get it twice. However, once we have fought them to a standstill, they are hardly pathogenic.
  6. Nice explanation of why the law includes the phrase "Beyond reasonable doubt".
  7. Strictly, that's also true of Rb- you just need to wait about 10^12 years for the unstable one to decay.
  8. SD cards, the cloud, or big hard drives.
  9. In principle, but you are likely to get fumes of SO2, so be careful.
  10. No. Even if gold was the same price as copper, it would still make sense to use copper for motor windings- because it is much less dense. (Copper is also a slightly better conductor.) As I said, part of the rarity of the use of the purple gold alloy is the cost. That's why I said So, once again, thanks for finding confirmation of my earlier post.
  11. No There is nothing which you can calculate from those data which has units of metres per metre.
  12. Thanks for finding a source which tallies with my view that nobody makes motor windings from gold, and that the current use of the purple Au/ Al alloy is rare.
  13. They often use aluminium because, while it isn't as good a conductor as copper or silver, it's a whole lot lighter. Gold would be a very poor choice for motors that change speed often. If gold suddenly became cheap, metallic purple jewelry would be more common. https://en.wikipedia.org/wiki/Colored_gold#Purple_gold However the energy cost in de-orbiting stuff is generally huge
  14. Thanks for the summary. It was a nice clear precis of the original work. It has saved many of us from the trouble (and, probably, discomfort) of reading the book. The book is utter tosh totally devoid of any basis in fact.
  15. It's also easy to refute most of the points raised. Many are just wrong, for example: Allergies are observed in most mammals. We are most likely to spot them among our pets https://www.msdvetmanual.com/dog-owners/skin-disorders-of-dogs/allergies-in-dogs https://thepigsite.com/disease-guide/sunburn-heat-stroke
  16. Reality doesn't agree with your idea of what is rational. And it isn't reality which has made a mistake.
  17. That's interesting. If, like the Sun, I was made from hydrogen and helium, what would my emission spectrum be like? (assuming I'm at 37C and 1 atmosphere pressure). Would it look like black body radiation?
  18. No I did not. I was referring to the Oxford Chemist who was PM when I was studying chemistry at Oxford and, who I knew would have studied QM just as I had. I had no real idea what May had studied; I'd have guessed at PPE like Cameron. 1990 is not "over 30 years ago". Please learn to count. It's not so long ago that people have forgotten her. So, just to make it clear, as I said. It is not so long ago that we had a PM , specifically Maggie, who studied quantum mechanics. Since that's true, I don't need to "pretend" that I meant it. I still do. Trying to school a native English speaker on English idiom is not going to work out well for you. And we can add "Makes up sh**" about what people said and did" to the list
  19. "When will politicians learn the difference between spending and investment ?" About the same time that they worry about the long term fate of the country rather than the next election. So, probably never. Just a thought- does this mean that dictators (and 1 party states- it's much the same thing ) might actually do a better job in some cases?
  20. It wouldn't matter if they did. You still haven't posted any science.
  21. So, we can add "doesn't realise that QM is part of the chemistry syllabus" to the list.
  22. The Sun is so hot that most of the gas is ionised. Free electrons and protons are allowed to have (almost ) any energies. When they crash into eachother some fraction of the energy- depending on angles of impact etc, is sent out as em radiation. Also, at those temperatures the "lines" are broadened by doppler shift and at the high pressures involved they are also broadened by collisions. https://en.wikipedia.org/wiki/Spectral_line#Line_broadening_and_shift The overall effect is a mass of overlapping emission bands which approximate (rather well) to a black body spectrum.
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