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John Cuthber

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Everything posted by John Cuthber

  1. And so it won't end up in orbit round the sun. Had you forgotten what you were replying to? That's a convenient way to carry oxygen; but not a lightweight option. Why wait for an emergency? One of these will scrub out the CO2. https://en.wikipedia.org/wiki/Rebreather_diving But they aren't easy to work with. These are even more scary. https://en.wikipedia.org/wiki/Potassium_superoxide#Applications And we know what happens if you mess up an oxygen generator of that sort in water. "Analysts concluded that 23 sailors took refuge in the small ninth compartment and survived for more than six hours. When oxygen ran low, they attempted to replace a potassium superoxide chemical oxygen cartridge, but it fell into the oily sea water and exploded on contact. The resulting fire killed several crew members and triggered a flash fire that consumed the remaining oxygen, suffocating the remaining survivors." from https://en.wikipedia.org/wiki/Kursk_submarine_disaster
  2. The escape velocity isn't strictly relevant, but it's a proxy for gravitational energy. Essentially you "drop" your spacecraft towards the sun and it accelerates as it goes. If you don't fire retro rockets to slow it down, it hits the sun. It takes pretty much as much fuel to get something "down" as it does "up". What's the temperature at midnight? If you make sure your satellite rotates fairly fast you need to look at the average temperature, not the peak. There's a difference between "flying to Moon" and "flying to the moon". But... https://www.tripadvisor.co.uk/Hotel_Review-g5113909-d5113592-Reviews-The_Moon_Inn-Stoney_Middleton_Hope_Valley_Peak_District_National_Park_England.html
  3. You don't need to reach earth's escape velocity to get to the moon. The moon is in orbit, clearly well under the influence of Earth's gravity. You can't get to the moon with A space shuttle but... I'm sure there's an XKCD cartoon with a small flattish hill made of fireworks. How many shuttles would it take to launch a fully fueled shuttle into space?
  4. That ship doesn't travel as far as some.
  5. In addition to being a stupid attempt to defend your own bad practice; that's wrong. The lawyers in Liebeck v. McDonald's Restaurants and the like had never flown to the moon.
  6. It's a video of the reaction not happening. There's no precipitate. And there's no reason to suppose that sulphuric acid is produced.
  7. If you knew the exact time and date of the picture, and where it was taken. And you also had a second similar picture from elsewhere, and knew the time date etc for that one, I think you could triangulate the position of the moon by assuming the sun is "very far away". But I think that's doing it the hard way.
  8. Does that actually work? Not retail in the UK.
  9. You can stop worrying. 2 months of dry conditions will kill most bugs- regardless of whether we are talking about bacteria viruses or what.
  10. It's a remarkable story. Because snow does not cause pneumonia.
  11. It's as if something changed in those 2500 years. Maybe this. https://en.wikipedia.org/wiki/Baconian_method
  12. "Antimatter falls like matter" Says clumsy scientist who dropped it.
  13. " aren't 'the 5 senses' to do with the interaction between us and the rest of the universe ?" The idea that there's only 5 is one of Aristotle's mistakes. "And aren't bathroom visits due to internal proceses ?" So? We have more than 5 senses.
  14. Does anyone else believe that? Should they?
  15. They certainly didn't try very hard, did they?
  16. I think Sensei has nailed it. You copied a puzzle, but seem to be upset that they copied the answer.
  17. I'm still waiting for you to explain why, if you think UPS drivers get such a great deal, you haven't joined them. Incidentally, workers demanding more money doesn't generate inflation; it reduces CEO and shareholder pay. The bit about "the price just gets passed on to the consumer" doesn't really work because , as you say, the consumer decides to buy cheaper from elsewhere. So the local company realises that, if it wants to stay in business, it's better to reduce CEO/ shareholder remuneration than to go bust. What causes inflation is printing more money or otherwise devaluing it. Strikes just redistribute the same amount of money to a different group of people. Inflation is the reduction of value of money. The value of the money depends on what I can get for it- how many square yards of lawn can I get mown for a dollar? How much bread can I buy for a pound? If you give lots of the money to people who do not actually do, or produce anything, then (on average) you get less done for your money. Huge CEO salaries are the worst cause of inflation.
  18. I'm agnostic about God the same way that I'm agnostic about unicorns, hobbits and Zeus. Is that what you had in mind? It does, in fact, natter what we believe.
  19. Having spent 4 years complaining about the "Screaming Spires of Oxford", I wonder what Saudi Arabia has got to do with it. The faithful have alarm clocks...
  20. And some of the humans who post should know better than to spam us but...
  21. P 20 here might be a better estimate of the total. https://www.meti.go.jp/earthquake/nuclear/pdf/140424/140424_02_008.pdf It says it's about 10^16 Bq
  22. That's the whole "stock". If they let it out in one day it will still be less this year than the UK dumped this year. If it's over the course of a year, it's less than the UK dumped in a year. If it's over 30 years then it's 30 times less than the UK dumped per year. (Actually, it's rather less because of decay) However you slice it, it's not much stuff.
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