Question: an electron is accelerated from rest through a potential difference that has a magnitude of 2 . 7 E 7 V . The mass of

an electron is accelerated from rest through a potential difference that has a magnitude of 2.7E7 V. The mass of the electron is 9.11E-31 kg, and the negative charge of the elctron has a magnitude of 1.6E-19 C. a) what is the kinetic relativistic energy (in joules) of the electron? b) what is the speed of the electron?

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