John Cuthber
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Everything posted by John Cuthber
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It's probably better to say that fire is a kind of (weak) plasma. Some of the gases in a flame are ionised but most are not. The glowing blob in the microwave is probably much more strongly ionised than any flame.
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What certification do I need to buy Cadmium Oxide
John Cuthber replied to bolderchem's topic in Chemistry
Where are you? In the UK you wouldn't need any certification other than proof of identity (you might need to sign the poisons register) The tricky bit would be finding someone who was prepared to sell. Try eBay. -
Since CO is flammable there's every chance you could poison yourself then destroy the evidence with a house-fire. If that's the plan, then you might want to consider using liquid hydrogen cyanide which, in addition to being very toxic and seriously flammable, is also explosively unstable. A less extraordinarily stupid idea would be bug spray.
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Single electron transfer in magnesium would be very odd.
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Actually, pure ozone is also explosively unstable. It's also quite toxic. It also has little or nothing to do with the fact that this MMS stuff is all balderdash. I have seldom seen something as absurd as the suggestion that "Chlorine dioxide does no damage to the human body". Don't believe me? OK- fine, go and breathe some. (don't get your next of kin to sue me though- if you want to kill yourself, that's your decision, not mine) This "chlorine dioxide reacts readily with amino acids cysteine, tryptophan, and tyrosine,", on the other hand is perfectly plausible. Since all those things are vital to the human body it's hard to see how you can say that something that destroys them "does no damage". It seems they can't even get their own story straight. For the record "It has the ability due to unique one-electron exchange mechanism." is bollocks too. Plenty of materials in the body are capable of single electron transfers. Iron and copper are probably the best known. Like the guy says "Read it for yourself and decide"
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http://en.wikipedia.org/wiki/Devarda's_alloy. how much stuff do you get to analyse? How much does it take to do these reactions?
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If some French politician suddenly raised taxes the French might very well go on strike because of a swing to the Left. It's change that upsets people. (from someone who wonders why his Prime minister thinks adding half a million to the dole queues is a good thing to do in a recession)
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Obtaining Potassium Cyanide for Jewelry
John Cuthber replied to jaymeroo's topic in Applied Chemistry
Am I the only one who laughed when I read that someone thinks a scan of a photo id proves anything more than that you can borrow your dad's driving license for a few minutes? -
You could, in principle, use piezoelectrics. The reason nobody does, is that they are a bit of a pig to use. (OK, they do get used for e few things where the distance needed is very small)
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I always thought that the Mossbauer experiment was a particularly neat demonstration of SR. Saying (of it and others) "They show that the velocity of light is isotropic on the Earth’s surface." seems rather odd, since it actually directly shows the energy shift of a photon that travels uphill, rather than down. The speed of light may be the same, but the change in energy is perfectly measurable.
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Is compromise good all the time? No. Sweeping generalisations are always a bad thing. Is this "Is it still a good idea to try to reach a compromise with them, or would it be better to totally ignore them?" a false dichotomy? Might it be , for example, better to explain why their desires are unreasonable?
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I'm not sure but I think France has recently (say, the last 10 years or so) moved to the right. So the general sense of the 95% or so of the world outside the US isn't likely to be that " France has moved so far to the left ..." Also, if I were a student and was going to be looking for a job shortly I wouldn't want a whole bunch of old folks cluttering up the jobs market. It makes perfect sense for young people to protest. It's perfectly reasonable of them to do so. There are several options- raise the retirement age, lower the benefits or raise the contributions. Perhaps these people prefer one (or more) of the options the government isn't using.
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Most glass has iron in it, though I doubt you would be able to measure the amount extracted with the kit in a school ( or even undergraduate ) lab.
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"well the parabolic mirror i think should be 11.43cm diameter." why?
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Even placebos have side effects.
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I can't see how it's science at all. There's a bit of probability in there but hardly enough to make it maths.
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The only form of knowable truth is tautology
John Cuthber replied to Mr Skeptic's topic in General Philosophy
"All green unicorns are green" is, I think, a tautology. But as far as I can see, it's totally unhelpful. It doesn't tell you anything. -
formula of copper(II) ammonium sulphate
John Cuthber replied to Dimdims's topic in Inorganic Chemistry
http://tinyurl.com/2ujujcp -
At least I get to point out that one answer to "Know why the people from European nations, middle eastern and Asians speak English?" is that some Europeans ARE English.
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Can any event occur that has no cause?
John Cuthber replied to needimprovement's topic in General Philosophy
I has been proven that some questions are undecidable- the answer can not be known. http://en.wikipedia.org/wiki/G%C3%B6del's_incompleteness_theorems -
It hardly matters, there's vitamin C in apples too. The glucose in most fruit juices would reduce the stuff anyway.
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Can any event occur that has no cause?
John Cuthber replied to needimprovement's topic in General Philosophy
(as if it matters) If I got round to picking up my degree it would be a BA (Hons) in chemistry. The name of the degree really doesn't mean a lot, it's usually a historical thing. Imaginary number; you need to find out what a proper noun is. Death, for examples isn't usually one*, but it has a cause. * Except in Terry Pratchet novels etc. -
Can any event occur that has no cause?
John Cuthber replied to needimprovement's topic in General Philosophy
OK, so I should have asked how do you tell the difference... It was just as radioactive last Christmas. What (as I asked before ) caused it to decay at that time? Your assertion seems to be at odds with the evidence. Please tell me the cause of the decay that happened and made my counter go click.