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TopicPolitics Containment Topic 128: Total Eclipse of Breitbart
LordoftheMorons
08/23/17 12:55:29 AM
#210:


NFUN posted...
hey lotm would an object in a gravitational well have lower mass than when it's free like in other potential wells or do weird general relativistic shenanigans screw with that?

I'm not sure exactly what you mean by stuff having a lower mass in a potential. The potential should lower the object's energy but not its mass.

Most physicists define mass to be invariant (m^2*c^4=E^2-(pc)^2 is a frame independent constant) so your momentum is gamma*m*v instead of m*v with a varying m. If you are going with a definition of mass where m=gamma*m0 though the only thing that affects the mass is the object's velocity.
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