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John Cuthber

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John Cuthber last won the day on March 31

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About John Cuthber

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    Chemistry Expert
  • Birthday 11/10/1965

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  1. The good news is that we are able to dismiss his views on the WHO.
  2. So, we dismiss Trump out of hand - because he was so wrong about lots of things. And, on that basis- we know that his views are often wrong. So, for example, since he didn't like the WHO, we can reasonably deduce the the WHO is probably a good thing.
  3. I'm not sure, but I think that they rely on the fact that the aluminium corrodes faster in more acidic soils and thus sets free more electrons which pass through the meter and give a larger reading. Or they may work on a principle is similar to this. https://en.wikipedia.org/wiki/Antimony_electrode How would that help find out how the meter works?
  4. I'm not sure i have understood this. Does this only work with primes where the two factors differ by two- which is interesting but not much use (I think there's an easier way)? If not, please show us how it works with 33,033,660,080,507 (which isn't a product of very big primes, just fairly big.)
  5. You can. Most of the UK’s electricity is produced by burning fossil fuels, mainly natural gas (42% in 2016) from https://www.energy-uk.org.uk/our-work/generation/electricity-generation.html Fridges move moisture about, but they don't "produce" much. A lettuce doesn't steam as much as a roast.
  6. Is it a gas powered refrigerator? Most electric ones are practically airtight and don't give off moisture at all.
  7. I always wonder if that was meant to be ironic. It is, at root, a commentary on people... Nearer the topic; Someone once described the House of Lords as "A very civilised way to look after the elderly". I sometimes think that government research labs are a very civilised way to look after us nerds.
  8. I'm guessing at a typo. https://en.wikipedia.org/wiki/Overtone And the idea of "concordance" or "consonance" is cultural, not mathematical.
  9. The octaves are important- as Exchemist has explained. If two notes are in harmony then the octaves above them will also be in harmony. The division of the octave into 5, 8 or 12 (or more) is arbitrary and largely cultural. Having said that, there does seem to be something about the pentatonic scale that people all seem to "get".
  10. OK, imagine I get some sort of electrical generator- perhaps a Wilmshurst machine, and I put it on an insulating slab like a thick sheet of polythene or something. And I set it running (let's say it has a battery drive motor, and a remote control- so I can do that without anything being connected to Earth). such that it charges the two spheres - one positive and the other negative with respect to eachother. And then imagine that I bring an earthed wire near to one of the spheres. What do you think will happen? Not very, and not for long.
  11. No, they were protecting the dollar. That's what they always do. That's what makes this so funny.
  12. And that is well within the range of typical static electricity. https://en.wikipedia.org/wiki/Static_electricity#Static_discharge You don't know much about this, do you? It isn't the charge that makes a difference, it is the voltage (though the two are related).
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