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"ralph sansbury" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > "George Dishman" <[EMAIL PROTECTED]> wrote in message > news:[EMAIL PROTECTED] > > > > How about a little test. What is the mass of an electron > > moving at 0.9999c? I say it is 9.1095*10^-31 kg. What do > > you say? > > I say the mass is greater (1-.9998)^-1/2 about times > 9.1095*10^-31 kg. OK, that's M_r = 6.442*10^-29kg. Now suppose the particle is moving due east. (Bear with me please, the point I am trying to illustrate becomes apparent soon:) Apply a force of 6.442*10^-29N in an northerly direction to this particle. What is the acceleration? Apply a force of 6.442*10^-29N in an easterly direction to this particle. What is the acceleration? > You say the product of this times .9999c is what is greater > which implies that the mass as observed in mass spectrometers > Kaufmann's experiemtn is greater. Current physics says the mass is m = 9.1095*10^-31 kg and the kinetic energy is KE = 5.7075*10^-12 J Note that your M_r = m + KE/c^2 > Of course you can play semantic games but they are only > sematic games unless you can say where the increased momentum > resides. > I say it resides inside the charged particle and that the mass > does not increase as the spectrometer says but that the magnetic > interaction in Kaufmann's experiment becomes noticeably non > linear as v approaches c. I don't follow, you just said the mass does change above. I agree the momentum is not linearly related to speed, the same is also true for the kinetic energy. > You should look at Kaufmann's experiment FAQ I tried "Kaufmann FAQ" in Google and got a baseball library and a "rotten tomato forum". Can you give me the URL for this document? George
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