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swansont

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Everything posted by swansont

  1. A rotating mirror is a way to measure the pseed of light, but I don't think anyone has used that to try and measure the small shifts you want to try and do - you're right, you'll never see that small of a change. The Michelson interferometer experiment of Michelson and Morley
  2. Well, they're looking down, right. So when one yells, "Omigod! I'm blind!" you know you've found them.
  3. That may be what you meant to say, but that's not what you said. See the difference? Do you also understand that the "rolleyes" icon is usually seen as being sarcastic in nature? As in, rolling your eyes? You use it a lot, and it may change the perception of how your posts are received. The icons basically take the place of inflection in speech, and add context. Sorry YT. I'm done here.
  4. swansont

    einstein ?

    The speed of light is related to the permittivity and permeability of free space. That's the connection that led to the realization that light is an EM wave. The values of [math]\mu[/math] and [math]\epsilon[/math] also give the index of refraction, which ties into the actual speed of propagation of an electromagnetic wave through a medium. Even though it's all a model (based on Maxwell's equations) that's enough reality for me.
  5. No. Why would you think it was?
  6. M-M used an interferometer to measure phase shifts, not speeds.
  7. swansont

    einstein ?

    The difference is philosphical. Are the models we have of nature actually physically correct? Does it matter if that's the way nature actually behaves? Models are what we have. We can't know if they truly depend on c, or other constants, because we can't change the values. That's why they are called constants.
  8. I can't really tell if your being obtuse is deliberate or not. Are you really this confused about the difference between fact and opinion? Whether or not life exists outside the solar system is not a known fact, and cannot be checked. What is said in the Constitution is and can. You can't have an opinion about what is actually stated in the document. It either is or it isn't.
  9. Yes. But they also define accelerate as "to move faster" which is incorrect from a technical perspective. Sayo's sig line is still spot-on, and applies to M-W.
  10. swansont

    einstein ?

  11. It might be better say they balance, since they act on different objects. For internal forces, any momentum lost by one object is gained by another.
  12. It's perception - physiology/psychology. Not physics.
  13. But a lot of the nutrition aspect is determined while you are very young.
  14. swansont

    Momentum

  15. But that's not what you were arguing. "I just think that a man's business is his business and I further think that the Constitution limits the authority of the federal government and both of those things trump the so-called right to be hired--or served--indiscriminately, regardless of how honorable the goal may be." That is written as a statement of fact, not opinion.
  16. If you define it as 'revolve so the sun goes from overhead to overhead' then I think it's in early January/July for southern/northern hemispheres. The earth's orbit is slightly eccentric and the perihelion (point of closest approach) is in early January. So the earth is moving faster and covers a greater distance along its arc, and thus must rotate through a slightly larger angle to return to solar noon. The slowing of the earth's rotation from tidal friction is a separate effect. The earth's rotation has actually been speeding up lately.
  17. Article I, section 8, clause 3. The Congress shall have Power ... To regulate Commerce ... among the several States
  18. That is the derivation. Start with v=0. This is undefined if v=u. So an object travelling at constant speed takes an infinite time to travel a distance d. Is that reasonable?
  19. swansont

    Momentum

  20. You can Google...
  21. Creationists proposing "conservation of information" is a really, really, reeeaaally bad argument to make in support of it being true. But their argument (at least the ones I've seen) is that "information" can't be created, and can only be destroyed, because of entropy. But there is no such law. If it can be created, it is not a conserved quantity. Gotta come up with a different description. I know what an endothermic reaction is. I was wondering what an inderthermic reaction was. It didn't seem to be an easily made typo, but I guess that's all it was.
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