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exchemist

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Everything posted by exchemist

  1. Maybe this volatile liquid is what @swansont had in mind with his suggestion about turbines. I would agree that if one can get a working fluid at ~100C, say, extracting heat from a chip at 120C, there is some chance of getting it to do some useful work, though perhaps not much better than the old atmospheric steam engines, pre superheating. One could certainly run a domestic hot water and central heating system if heat at 100C is available.
  2. The picture I found was this: Whereas simple iron (II) citrate was indeed brownish grey-green:
  3. I think you are the exploding thymus gland/spontaneous combustion guy.😆
  4. Well citrate can chelate with Fe in various ways, so perhaps there is a bright green complex you can get under reducing conditions. I found a picture of a fairly bright green powder on the web, called sodium iron citrate, but could not find a chemical formula for it. You may well be right that exclusion of oxygen is the key, as Fe II oxidises to Fe III so readily. It will be interesting to see what happens to the colour when you expose it to the air.
  5. Information from what sources, and how is credibility established?
  6. Actually, after a bit of digging I came across this: https://electronics.stackexchange.com/questions/60273/max-operating-temp-of-ics. which suggests the chips themselves may be able to operate up to 125C. So then it's a question of what is the max temp of the coolant that carries the heat away from the chip. I assumed this would be air ventilation and that the liquid coolant would be used to cool the air, but maybe I'm wrong and the chips are in an oil bath or something. (Deep fried?😁)
  7. I remain curious as to the temperature of the heat this system can provide. I don’t know but would guess computers would run at a maximum of about 50C. That’s barely enough to run radiators, let alone generate domestic hot water. There don’t seem to be any temperatures quoted. Can computer processors run at 70-80C?
  8. OK, fair enough. But still the temperature difference above ambient won't be that much so it can't be very efficient.
  9. Not turbines, surely? The temperature of the waste heat won't be high enough. Space heating is about all it would be good for, I should have thought. But certainly district heating would be feasible.
  10. And now the suspected spammer in question has just run up the Jolly Roger: https://scienceforums.net/topic/135719-sfn-migrated-and-upgraded/page/5/#comment-1303754 And that’s after sleeping for 10 days, mark you.
  11. I would say anything made up of entities with rest mass. So not including radiation.
  12. Yes still down today. Looks like a serious issue.
  13. My guess is they have always come at intervals but only recently have our sensors become good enough firstly to spot them and secondly to determine that they come from outside the solar system. However maybe someone with more knowledge will comment.
  14. Hmm, I wonder if whatever makes the sugar brown (obviously not sucrose but something more complex from the sugar cane) is going green under acid conditions from the lemon juice. You could try with a bit of just sugar solution plus a few drops of lemon juice and see if there is a colour change.
  15. Maybe - and see what @CharonY has to say. I have no experience with this, apart from a bit of green growth I get on my transparent plastic water filter every few months. Hope I’m off-track. Is it green all way through or just on the glass surface?
  16. Golly! No idea. Hope it’s not chlorophyll from some opportunistic invader!
  17. Except the future of medicine won't be about silly notions like "detoxing". That is the sort of term used by crooks trying to prey on the health anxieties of impressionable people.
  18. It looks as if the Americans on the forum have addressed the points you raise, so there is no need for me to respond.
  19. You seem to have a rather naĂŻve religious faith. There is no conflict between the science of Big Bang cosmology and Christianity. In fact the Big Bang was first put forward by a Christian priest, Mgr. LemaĂźtre! It is only those fundamentalists who believe in biblical literalism - a small minority within Christianity - who struggle with accommodating science to their beliefs. By the sound of it you may be one of those. The Big Bang theory, like all theories in science, is based not on proof but on observational evidence. There is evidence, in the form of the observed cosmological red shift and in the observed Cosmic Microwave Background Radiation (CMBR). So yes, based on the evidence, scientists have a degree of faith in the Big Bang model for the expansion of the cosmos from a very small early state just under 14bn years ago. Please note by the way that this is not a theory of how the cosmos came to be. We have no evidence of that. It is a theory of how it initially expanded, because that is what the observations indicate. The faith science has in its theories is not religious faith, though. You need to understand that in science all theories are provisional. They represent the current best model we have. As such, they may be subject to future change in the light of new evidence. So scientists are not committed to a belief system as eternal truth, in the way that many religions demand of their adherents. Your postulate is therefore misconceived, due to your lack of understanding of the nature of science. That's OK, it's common for people outside science to have only a hazy grasp of what it really is. And in a way you are right that scientists are philosophers, though day to day they may not be aware of it, since what I have been laying out here in simple terms is the underlying philosophy of science.
  20. Yes, seems to be a load of spherules indeed. 😆 It seems to me some of these guys get seduced by media interest to their detriment of their science (Brian Cox and De Arse Tyson spring to mind). Tegmark/Shapiro, of "mathematical universe" fame, or notoriety, depending on your point of view, is another Cambridge, Mass man (MIT) who seems to have decided to go the showmanship route and milk his enfant terrible status. But he's a lot less nutty than Full Frontal Loeb.
  21. Trump has certainly ignored or delayed complying with court rulings. Not so far the Supreme Court, it is true, but then he has not had to. Yet. However Trump has got to work wrecking the other moving parts in US democracy: administration of justice, freedom of the media, academic freedom, ease of voting, and has deliberately chosen unqualified people who owe their position solely to his patronage to run major departments of government. He has inserted underqualified justices into the Supreme Court on the same principle. He has also grossly exceeded his powers, relying on a supine Congress not to pull him up for it. So he’s doing a pretty good job of dismantling US democracy, considering he has only been in office less than a year.
  22. This guy seems to be either going nuts or to have decided to become an entertainer rather than a serious scientist. Is the lure of the bright lights of the TV studio and the fun he can have as a public enfant terrible, in the mould of Tegmark/Shapiro or Yuval Noah Harari? Or does he really believe in 50 billion ton spacecraft that give off a mixture of gases in the form of a cometary tail? Perhaps the truth is more mundane: he set off asserting it could be alien technology and now finds it too embarrassing to withdraw.
  23. Yes, thank you, Sirius Cybernetics Corporation, this is the third time you have told us.
  24. Thanks. This would seem not exclude the possibility that Rationalwiki may be under some sort of attack, then.

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