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cantab

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Everything posted by cantab

  1. Arthur C. Clarke. There won't be many myths getting busted from his hard science fiction.
  2. Ignore starting or current prices on eBay, look at final selling prices, since many people only bid very late. Of course if they're bad games, they're probably not going to fetch much money.
  3. cantab

    Riddles

    Not that. Looks like a cool game though. Reposting on new page, Making light of tragedy, making mere numbers of patient art and science, a grid at times in a grid in a grid. For many the answer's close at hand, while some must travel near or far, but however long it takes I hope you keep smiling. Clue 1: The solution is something I'm very confident everyone in the thread, indeed virtually everyone on KSP forums, has heard of.
  4. I can't speak for that site specifically, but certainly I wouldn't discount the option of buying. Plenty of sites will give you a good amount of flexibility, and it saves you time and risk (of breaking parts). You'll probably pay more but often not a lot more.
  5. cantab

    Riddles

    Haha. If that was a guess, it's not any number of boosters.
  6. The game gives masses in tonnes, speeds in m/s, and thrusts in kilonewtons. Distances are in various metric units (metres, kilometres, megametres, etc). Fuel is given in arbitrary volume units. There is no in-game evidence they're litres and good reason to think they're not. Liquid fuel and oxidizer both have densities of 5 kg/unit, monoprop is 4 kg/unit, xenon I forget. Electricity is given in arbitrary units. 1 Ec = 1 kilojoule seems reasonable when considering solar panel and RTG output.
  7. cantab

    Riddles

    Have I scared people off? Clue: The solution is something I'm very confident everyone in the thread, indeed virtually everyone on KSP forums, has heard of.
  8. The main fusion reaction being worked on is deuterium-tritium fusion. Deuterium is found naturally and as mentioned makes up less than 1% of the hydrogen in water. Tritium is manufactured in nuclear reactors. Proton-proton fusion, using normal hydrogen, isn't under consideration because the reaction results in a diproton which almost always splits up again, only rarely beta decaying to deuterium. But even if it was, annual world energy use is on the order of 1018 Joules. That entire energy demand could be met by a single ton of hydrogen, so 10 tons of ocean water. The world's oceans contain a billion billion tons of water. Maybe one day we'll (f)use it all up, but by that point Earth will be a likeness of Coruscant and humanity will be an interplanetary if not interstellar civilization. And what's valuable is fresh water. Seawater is not scarce for any non-landlocked country, but isn't very useful (can't drink it, can't water crops with it) and it's expensive to desalinate it.
  9. Even in the stock game you can fly a much more realistic ascent profile than players usually do, it's just actually less efficient, but that won't matter for the presentation. If you like, mention in passing that the simulation's aerodynamics aren't very accurate so a real rocket's ascent might be slightly different.
  10. Crashed into Vall. I should have learned my lesson not to try and land things that weren't meant for landing on the body in question (or, in tonight's case, anywhere) after my second Duna impactor.
  11. cantab

    Riddles

    I did. But it's not the subject of this riddle.
  12. Invalid 29 unfortunately, you let a 1 sneak in. 29 = 33-(3+3/3) is valid 30 = 33-3 31 = 33+(3/3-3) 32 = 33-3/3 33 = 33 34 = 33+3/3 35 = 33+(3-3/3) 36 = 33+3
  13. Not sure there was much point in that...the previous thread had been dead for two months, and asked a slightly different question anyway.
  14. cantab

    Riddles

    Not chess. I vaguely recall that being the answer to a previous riddle ;-)
  15. cantab

    Riddles

    Lol. Not KSP, no. It's a good fit, but unless you install Kethane there aren't really any grids in KSP.
  16. After a week of research and effort, concluded that a Tylo assist out of the Jool system just cannot give me enough delta-V to make the 180-day trip back to Kerbin I'd been hoping for. So it's back to the 250-day trip which I can do without an assist. *sigh*
  17. Linux. I've been using Linux as my main OS for something like a decade now. If a game runs on Linux I'm more likely to play it, it's just inconvenient to reboot into Windows. And I wouldn't really want to use Windows all the time.
  18. Considering plenty of carriers have been designed for VTOL aircraft, I very much doubt it's going to be problem. I'd be extremely surprised if a cats-and-traps type carrier wasn't able to take a VTOL landing on it, and anyway there's always the HMS Queen Elizabeth when it's finished.
  19. Have a read of The Selfish Gene, Dawkin's handles this issue quite well, relating such "anthropomorphic" explanations to more direct consideration of selection of genes. And also - what is the main topic of the book - explains how altruistic behaviour in individuals can be to the non-altruistic, 'selfish', benefits of genes influencing behaviour, and thus how altruism can evolve at all.
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