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Everything posted by Gilded

  1. It's estimated that 600 million tons of hydrogen is converted to helium each second in the Sun. While that's not the only kind of fusion that keeps it going, it illustrates well what kind of resources you would need to extend a star's lifespan, even if you could dump it all directly into the core.
  2. Ah, the handgun thread was brilliant. Extra credit for Hitler being mentioned as early as the 23rd post.
  3. If you look very closely you can occasionally see small DNA strands dressed as members of Village People. But seriously, genes alter basically all of our behavior to an extent but it's pretty obvious they aren't the sole reason for homosexuality (due to reasons well summarized by Sisyphus).
  4. Gilded

    Making heavy water

    I guess it's possible, sure, but I'd imagine the Girdler process is more energy efficient (although this kind of enrichment processes always require ridiculous amounts of energy), and that it achieves a reasonable purity with a convenient chemical cascade setup. I'm not sure how desirable the process is for small scale production though.
  5. As I've probably said before, "nothingness" is more of a philosophical than a physical concept, and is (sort of) defined as such.
  6. Knowing is half the battle. If people didn't know about fecal bacteria they wouldn't have that much of a reason to wash up after a Boston pancake. PS. If you don't know what a Boston pancake is I don't recommend looking it up. Especially on an image search.
  7. Gilded

    Making heavy water

    If someone is interested in how they do this industrially, one method is the Girdler sulfide process. AFAIK chemical processes in general are the way to go initially, followed by distillation.
  8. This is like asking if bread and soap mix. They're there, but they don't really have that much to do with eachother so there's very little overlapping. ...unless you like to eat sandwiches while showering. (????)
  9. While the photon mass-equivalent thing is an outdated concept I think it's an adequate analogy. I don't really mind that it's being gradually shifted out of textbooks though.
  10. MoTiVAtIONaL... that's one letter shorter though. Aha, now I remembered "-PHoBiAc". How about ORnIThOPHoBiAc? Meaning someone who's afraid of birds.
  11. Gilded


    No. According to current results they would have to have a half-life of at least 10^35 years if they decay at all.
  12. Well yeah I suppose it's more convenient as it has the E in there rather than the wavelength.
  13. Gilded

    Whats the catch?

    If by large you mean a coil larger than any manmade structure yet then you're probably right. Tesla coils are relatively safe projects compared to stuff like coilguns where a large capacitor bank is used.
  14. Due to mass-energy equivalence ([math]E = mc^2[/math]) you could say that a photon has mass since it has energy, and thus it has momentum since it has a non-zero velocity. And anyway [math]p=mv[/math] is just a classical approximation. For example the momentum of photons is described by this equation: [math]p = \frac{h}{\lambda}[/math] where [math]h[/math] is Planck's constant and [math]\lambda[/math] is the wavelength of the photon.
  15. Well uh... so is your face!
  16. All of it falls within the bounds of the uncertainty principle. Virtual particles can violate rules all they want as long as they don't get caught, so to speak. Regarding causality, information isn't transmitted at superluminal speeds even by virtual particles with negative energies as noted by Severian.
  17. Burning magnesium in dry ice is kind of nifty. Here's an example: http://www.youtube.com/watch?v=8OaeSdaaQeE
  18. Gilded

    Gen Y and paper

    USB drawing boards are handy if you need to scribble equations or something without destroying all of Earth's rainforests etc.
  19. What about it? In that case the potential is electric rather than gravitational. Energy differences in electron configurations and so forth.
  20. Green fire: Mix some boric acid with ethanol. This might be what you did for the project, but if it isn't you might want to try it. It's beautiful. A very bright flash: Mix 1.4g of potassium perchlorate with 0.6g of aluminum powder and light it with a fuse or a burning stick. As with burning magnesium it's not recommended to stare at it directly. Melt steel: Thermite. About 75% Fe2O3 and 25% aluminum by weight. While thermite isn't as destructive as it's often portrayed to be, one kilogram can easily melt a steel pan or similar sized object as evidenced As for other stuff it would definitely help if you'd list some equipment and materials you have access to.
  21. Gilded

    Exam lunacy

    I think it's only fitting that your score was relatively excellent. Although I suppose all observers perceive A as A no matter what their own score is.
  22. "My eyes! The goggles do nothing!"
  23. That's a rather inaccurate definition of a chemical element. For example, a uranium-238 nucleus can decompose into a thorium nucleus and a helium-4 nucleus (alpha particle) through radioactive decay, yet uranium is a chemical element. Better definitions include "an atom distinguished by the number of protons in its nucleus" and "a chemical substance composed of atoms with the same number of protons in the atomic nucleus", which covers the iodine molecule you mentioned and the block of copper big314mp mentioned.
  24. Five-seven-five please You must abide by the rules Or Phi will spank you.
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