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    Thread: Is there any truth to this?

    1. 08-18-2012 12:27 AM #26
      Xei
      UnitedKingdom Xei is offline
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      So... was there any theoretical reason for which Einstein decided that gravitationally accelerated frames are equivalent, but not, say, electrostatically accelerated ones?
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    2. 08-19-2012 02:59 AM #27
      DrunkenArse
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      An electrostatic frame isn't accellerated, is it?

      I'm not sure though. There're differences in the force. Matter can have different EM charges in relation to its inertial mass but there's a consistant ratio of gravitational mass to inertial mass. Probably has something to do with that.
      Previously PhilosopherStoned
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    3. 08-19-2012 03:52 AM #28
      Xei
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      By electrostatically accelerated I just meant a particle accelerated by the field due to a charge, analogous to a particle accelerated by the field due to a mass.

      I see what you mean about inertial mass. Didn't think of that, I guess you're right.
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    4. 08-20-2012 12:48 AM #29
      cmind
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      Quote Originally Posted by PhilosopherStoned View Post
      An electrostatic frame isn't accellerated, is it?

      I'm not sure though. There're differences in the force. Matter can have different EM charges in relation to its inertial mass but there's a consistant ratio of gravitational mass to inertial mass. Probably has something to do with that.
      That's precisely it; Einstein postulated that inertial mass and gravitational mass were actually the exact same thing in nature.
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