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John Cuthber

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Everything posted by John Cuthber

  1. I think you can forget them in this case, they get deprotonated to the carboxylate ion which is negatively charged and so it's not attacked by the hydride. Esters, IIRC are reduced by LiAlH4
  2. Since you are asking about its properties I think it's fair to say that you are not familiar with them. Since you also think that you need to heat the stuff to get it to detonate (you don't) and that an apron etc. will do you any good (it won't) then I think my remark is fair comment.
  3. Is this the sort of things you are after? http://en.wikipedia.org/wiki/Electrodialysis
  4. Neat, but not, I fear, very practical.
  5. As far as I can see you haven't ruled out a system like the sun and the earth. You need to specify the original conditions but, in any event this is a bit of calculus that must have been done before.
  6. "it should only be handled with appropriate safety equipment, and under the supervision of someone who is familiar with it's properties." So, not by you then.
  7. Pb (NO3)2 and charcoal would probably be more vigorous than black powder and I wouldn't try it in a test tube. Dissolve the stuff in water and precipitate PbCO3, then reduce that. (Also, part of what precipitates may be a basic nitrate- be careful with this- dodn't try it in front of an audience untill you have tried it outside and without the distraction of keeping the audience happy.
  8. Did you hear about the homeopath who forgot to take his "medicine"? He died of an overdose.
  9. This http://www.vanmeuwen.com/plant/73965 has the advantage of being there when you are out.
  10. You will find that glass melts before copper. Do you have a fused quartz tube? If you have some cassiterite about the place you might pretend to be bronze age. Also, bronze has a somewhat lower melting point (though probably not low enogh for a glass tube). I think the smelting takes place below the melting point because the reaction is between CO and CuO. My guess is that the reaction wouldn't work so well in a vacuum untill the CuO melted.
  11. The syntheses of ethanolamine, diethanolamine and triethanolamine among other things relies on the reaction of an epoxide with ammonia or an amine.
  12. I have seen plenty of stairs which are more or less like the second case shown. It's common for the riser to be set back from the edge of the step when using timber. Like these. http://www.blocklayer.com/stairs/ But with concrete the design is pretty much pyxxo's second diagram. http://images.google.co.uk/imgres?imgurl=http://www.builderbill-diy-help.com/image-files/st-concr.jpg&imgrefurl=http://www.builderbill-diy-help.com/formwork-stairs.html&usg=__VMrFpT-1CjqSBKn_UGXlOccuk7o=&h=364&w=484&sz=24&hl=en&start=16&um=1&tbnid=usDrpgKF9xWl9M:&tbnh=97&tbnw=129&prev=/images%3Fq%3Dconcrete%2Bstairs%26hl%3Den%26rlz%3D1T4GGLJ_en%26um%3D1 Also, a bee hive has a stack of hexagonal tubes, but they have a nearly flat face. That face is at right angles to the axes of all the tubes. There are, therefore, plenty of right angles in bee hives.
  13. Has anyone 'phoned a Japanese plumber yet? (And, in case anyone is wondering, I do plan to keep on banging on about this until GoldenEagles actually answers it; preferably without mentioning God, Columbus, Einstein or any other "authority" figures) BTW, if you accept the riduculously over inflated costs suggested for doing this work then you can compare them to the million dollars on offer if it works. If I could win a million by investing a few tens of thousands I'd go for it. Why doesn't Dr Emoto? Could it be that he realises that he's a fake? Perhaps he tried, but the bank manger 'phoned the plumber.
  14. It should work with the carbonate, but be aware that some CO will be generated. Have fun playing at being a caveman with a bunsen burner.
  15. I think the distance between the pupils is relatively easy to measure. The last time I had my eyes checked it wasn't the optician but the sales' assistant who measured it- that's probably why it's not on the prescription. Any place that will sell prescription glasses should be able to measure it so, as long as you have the other prescription details, you shouldn't need another eye test.
  16. I'm not convinced that the best answer to the original question involves all the spinoffs. Surely it is like asking "Art; why bother?" and the answer is that it's what humans do. On the other hand, my favorite example is that particle physics like atom smashing makes lots of data and that some bloke at CERN wanted a way of sending lots of data round the place. There's a reference to it in that page ajb cited. The outcome was called the web.
  17. He may well want it but it's not this sites habit to give the answer. Giving hints and advice is better for th estudent.
  18. They may get the news round well enough, but the pirates have guns.
  19. The biggest word in this sentence "If colloidal minerals does indeed contain 60 or more minerals that may be valuable to the body, then why not?" is "If".
  20. Well, if you put fine copper wire in a candle flame it melts so that's over 1083C. Anyway, here's a demo. It's called "Reduction of Copper Oxide"- not very original. BTW, don't do thermite reactions in test tubes there's far too big a risk of flying glass.
  21. I imagine that by now the beer concerned has been drunk,
  22. "There is no need to account for, or explain; those things that QT already does very well." Yes there is, it's called producing a consistent theory. If your theory can't explain simple things then it's no use trying to get it to explain complex ones. "There is a need to explain those things that QT does not do." OK, but your theory hasn't done this. Is it any use at all?
  23. I always thought that the answer to "Okay, say someone would be an alcoholic, and destroys alot of brain cells. How long would it take for the brain to regenerate cells? " was "Do you believe in reincarnation?" because you won't regenerate any to speak of in this lifetime.
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