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swansont

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Everything posted by swansont

  1. If it happened uniformly, probably not. But we see time slowing down for moving reference frames, and we do notice it. Clocks get out of sync in a predictable way.
  2. But zero presents special problems. You can measure zero by mistake quite easily — leave something unplugged. Showing that you actually measured zero carries some extra baggage with it.
  3. I go with Gould's definition. In science, "fact" can only mean "confirmed to such a degree that it would be perverse to withhold provisional assent."
  4. There are examples of situations where "zero" is a mathematical prediction of a model — a permanent electric dipole moment of an atom, for example. Measuring that it is zero is what is essentially impossible. All you can do is make the uncertainty as small as possible.
  5. I was less impressed. I thought the solution to the grandfather paradox was rather weak. In any event, this is time travel rather than teleportation; hopping between parallel universes is little more than a science fiction plot device, and such discussion is not really consistent with the OP.
  6. Yes, that's why time is often referred to as the fourth dimension. When you learn about relativity, you find the relationship is more complex than our everyday experience: we move through spacetime at a constant speed, so motion through space slows the motion through time.
  7. The plasma would have gravity, but it would be negligible in effect — the electrostatic interaction is far stronger. The radioactivity would be from the leftover neutrons, which are unstable. However, you'd only have to worry about the neutron decay if you survived the initial barrage from the ~1 GeV gammas from the proton-antiproton annihilation.
  8. By definition, a 1 MW laser will be more powerful than a 1 NW laser. In the event that's a typo, I will reiterate what Klaynos said: that a 1 mW laser is always equal in power to another 1 mW laser. However, a 1 mW green laser will appear brighter than a 1 mW blue or red laser, as the eye is more sensitive to green light.
  9. What work have you done on the problem?
  10. No theory is ever proven, just accepted owing to the weight of the evidence.
  11. Except, as far as we can tell, the universe is electrically neutral. So it seems more like a coincidence than a balance.
  12. Why ask me for examples if you are going to ignore them in your discussion? I specifically mentioned which-path and self-interference experiments .
  13. Any number of interference experiments, e.g. "which path" experiments, and ones in which the particle interferes with itself. Those do not have classical trajectories.
  14. Who said that Schrödinger's picture is taken literally? On the other hand, why insist that the classical trajectory picture should be taken literally when there is experimental evidence that it isn't true?
  15. The ability to recognize the information as irrelevant is a test of your mastery of the material. It will happen on tests, too, so get used to it.
  16. ! Moderator Note As I noted above (#6), this is supposed to be an engineering discussion, and not a political one. There is a thread in politics for the latter.
  17. Making interpretations and having implications are philosophical issues, not scientific ones. These are not the criteria one uses to determine the validity of the theory.
  18. No, your comparison with the centripetal force doesn't work. The similarity of equations, such as they are, does not carry the implications you propose. The "safety" of sunlight has to do with the amount of atmospheric attenuation and the geometry of exposed surface area.
  19. In principle you could, but once the annihilation started, you might have trouble getting the antiparticles to actually hit. As long as you're hypothesizing, why not just go with anti-ions in a beam?
  20. In the US, the constitution is a document that delineates the power of the government, and also lists some of the rights the people have, which the founders thought important to list (and later amended as circumstances warranted), and our founders got to start with basically a clean slate. This is not true of European countries, where power was long held in divine monarchies, and rights had to be won or negotiated. Their right to free speech took a different path, and may be more limited than in the US as a result.
  21. swansont

    HD10180

    Which is a fatal flaw You consistently overestimate how clear your graphs are; I know it's been pointed out to you before that, at an absolute minimum, you clearly label your axes. I don't know what relationship you are trying to show in these graphs. What is percentage of radius?
  22. Yes, that's it. Additive color involves a source, and subtractive color involves absorption (which generally accompanies reflection). Computer monitors/TVs aren't technically additive, since the pixels don't overlap, but instead rely on diffraction present in the eye to give the effect. Color perception is intimately tied in with how the eye works. The yellow shirt can be perceived as yellow because it reflects yellow light, or because it reflects both green and red.
  23. Protons need to overcome or tunnel through the Coulomb barrier in order to fuse. Slowing them ensures it must be tunneling, and that probability decreases as you lower the kinetic energy.
  24. If you want to show that they are equivalent, by all means do so. Stop having a hissy because people ask for evidence, and because quantum physics doesn't give you a warm cuddly feeling.
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