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John Cuthber

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Everything posted by John Cuthber

  1. At 20 bucks, and well under a kilo in weight, why not just take a spare?
  2. How many other systems were as well tested as a game controller?
  3. Some people are citing this as an argument against diversity. Those are the people that don't realise that "everyone is young" is no more diverse than "everyone is old". They aren't helping. Interestingly, they also searched the surface of the sea quite intensively in spite of the fact that ... that's not where submarines "should" be. An application of this algorithm https://en.wikipedia.org/wiki/Streetlight_effect
  4. How come nobody but you has noticed?
  5. Thank you for your anecdote. Sorry to hear that the company is struggling.
  6. Because it is impossible to give a meaningful answer to the OP's question. Because it is potentially helpful to you if we point out that your reply, while well intended, was wrong.
  7. You could sell that. But... how would you advertise it?
  8. If you get this wrong, what happens to the dog? Tar is a mixture of many materials. If you didn't add anything to the stuff you distilled from wood then it's pure tar. How could you purify something that's pure to begin with?
  9. If you can avoid the use of a solvent then you avoid teh problem of having to remove it, so warming the material up is good- if it works. If you add an alcohol it will probably act as an emulsifying agent which makes things harder. (The ammonium salts mat do this to some degree anyway.) What are you seeking to achieve?
  10. It wouldn't. But if the tar is viscous then dilute acid will also fail to extract the amines from it. You dilute the tar, extract the amines and then remove the solvent.
  11. How viscous is the tar? It might be easier if you dilute it with a solvent that you can remove later. Maybe cigarette lighter fuel.
  12. Come to think of it... https://www.simplymedsonline.co.uk/cardiovascular/glyceryl-trinitrate-500mcg-tablets-gtn.html Other suppliers of volatile liquids in pill form are also available.
  13. It's quite commonly what causes the problem in the first place. How do you put a fairly volatile liquid in a pill?
  14. The ball is a capacitor- that's what it's for. And; fast as lightning, you worked out what the issue is.
  15. What evidence do you have that the current is low? What would limit it?
  16. As a rule those are not independent variables. Ohms law tells you how to calculate on from the other. Does anyone know why this myth persists? Why not? Twelve volts is twelve volts.
  17. Eventually, you will end up with the big tank full of gas at the vapour pressure of the liquid in the small tank. So you can't transfer all of it, but you can get very close. On the other hand, getting very close would need you to use liquid nitrogen or something to cool the small tank. Not only is that uneconomical,but you risk embrittling the steel.
  18. What's obvious is that only one of us is a chemist. But, back at the topic; iron rusts perfectly well in the dark, but not in the absence of oxygen. The ultimate reason why things degrade is entropy. https://en.wikipedia.org/wiki/Entropy
  19. https://en.wikipedia.org/wiki/Daedalus Sunlight is pretty good at damaging organic materials, but doesn't usually harm metals (which reflect it- that helps) and inorganic materials.
  20. Tobler formulated two laws, the second one (relevant to this topic) concerns geology and is sometimes referred to as "Tobler two" in the same way that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object such that f=ma . is sometimes referred to as "Newton two". You seem to be thinking about Tobler one. That's older than Tobler two, so it's not relevant to this thread. :-)
  21. I know that. You know that. The next guy reading the thread may not know that. No You can essentially "distill" the CO2 into the smaller bottle if you cool it and/ or warm the big one. In principle you can shift almost all the CO2 that way.
  22. Do not fill a gas cylinder with liquid. When it warms up, and the liquid expands, it will burst the tank (or the pressure relief if you are lucky). https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/docs/technical-resources/55771/calculation-and-verification-filling-ratios-liquified-gases.pdf
  23. You seem to be conflating two different things; Turing's test and a Turing machine. As far as I know, no Turing machine would pass Turing's test.
  24. You might argue that. But I don't think many would accept the validity of the argument.
  25. Under the right conditions you can get CO to decompose into CO2 and C. https://en.wikipedia.org/wiki/Boudouard_reaction Re-electrolyse the CO2 and, eventually,you will convert it all to C and O2. The problem is (as ever) where to get the energy from.

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