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John Cuthber

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John Cuthber last won the day on November 10 2023

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About John Cuthber

  • Birthday 11/10/1965

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    England

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  • Chemistry Expert

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  1. It seems that America isn't really "good" it's just "big". There are (if Google is to be believed) about 5300 universities in the USA. About 200 are on the "top 1000" list. That's about 3.8% There are 166 in the UK of which 25 are on the "top 1000" list which is about 15% France has 71 of which 27 are on the Shanghai list. 38% is impressive. Germany is confusing. "a total of 423 higher education institutions in Germany, including 108 universities, 211 universities of applied sciences, 52 colleges of art and music, 30 colleges of public administration, 16 theological universities and 6 colleges of education."
  2. If the ammonia gets oxidised to nitric acid, then it will acidify the soil
  3. If someone is deliberately exposing the world to organochlorine compounds, what are they hoping to gain and how are they avoiding poisoning themselves? A weapon needs a target; who is it?
  4. Though I made it humorously, the point I was making is very simple. They don't give you antibiotics unless you are sick. So the question is, which is likely to have a greater effect on fertility; the drugs or the infection? It's perfectly plausible that not taking the pills will leave you dead. And that's going to reduce our fertility much more than the drugs will. (An infection may also reduce it) Doctors and health insurance systems (private or nationalised) are fairly good at doing risk/ benefit analyses. Only focussing on the risks of antibiotics is just as foolish as ignoring them.
  5. I checked the data. It turns out that every man who died from an infection is infertile.
  6. I think you just discovered Kirchhoff's radiation law. https://en.wikipedia.org/wiki/Kirchhoff's_law_of_thermal_radiation
  7. In all sensible probability, nine lives won't be enough.
  8. Do you understand that those classifications are hierarchical? All rosales are rosids All prunus are rosaceae And all of them are plants
  9. With a lot of trouble and care (and a mass spectrometer) you can measure acid base equilibria in the gas phase with no solvent present. Many people have got PhDs by doing this, but I'm not sure it's had much wider use. (By wider, I mean outside the lab) You don't get "H+" ions in water. You get a hydrated version, typically modelled as [H9O4]+ So you are almost always looking at how strong an acid is compared to water. In principle, if you have just liquid ammonia, there are always some protons around to soak up. They arise from ammonia acting as a base. 2 NH3 --> [NH2] - + [NH4]+ The extent of that reaction is tiny, but not zero. (It's about 1 in 10 ^33)
  10. A Post-it note? https://www.staples.co.uk/office-supplies/writing-supplies/correction/post-it-cover-up-and-labelling-tape-25-4mm-658h
  11. No, or at least, only very slightly. More sugar would draw water in from the surrounding tissues (and from the blood) and that would dilute the acid a bit, raising the pH.
  12. Does the universe have a calendar? How did/ does it know when to switch the expansion on and off?
  13. And, if the universe is accelerating away from me, and has been doing so eternally, why is (any of) it still here? The question was "What makes you think the universe was "made up" and hasn't always existed?"
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