An electron is accelerated through a 6 MV potential difference. what is the mass of the electron at the end of the path?
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3A: $m_i=m_f=0.510;998;910(13)\ \mathrm{MeV}$ – AccidentalFourierTransform May 29 '16 at 14:15
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Thank you, but can you please put down the steps ? – Sarath May 29 '16 at 14:19
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@Sarath step 1: look it up on wikipedia – AccidentalFourierTransform May 29 '16 at 14:21
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This is right in classical dynamics, not in relativistic mechanics . i am trying to derive the relativistic mass using mass dilation equation – Sarath May 29 '16 at 14:23
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1Whether the concept of relativistic mass is useful is debated. But you can find there how to calculate it, if you want. – Han-Kwang Nienhuys May 29 '16 at 14:24
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1Hi Sarah and welcome to the Physics SE! Please note that this is not a homework help site. Please see this Meta post on asking homework questions and this Meta post for "check my work" problems. – John Rennie May 29 '16 at 16:05
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Sarath, there is a very good argument that the proper meaning of 'mass' in relativity is the invariant mass and that the archaric usage 'relativistic mass' should be abandoned post haste. Of course, in answering question from a book one is stuck using the language of that book, but but you shouldn't be asking for solutions to exercises for from textbooks on [physics.se] in any case. – dmckee --- ex-moderator kitten May 29 '16 at 18:42