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July 30, 2014

Homework Help: physics

Posted by PLEASE AND THANK YOU on Thursday, April 4, 2013 at 10:06pm.

An electron is accelerated from rest through a potential difference that has a magnitude of 2.90 107 V. The mass of the electron is 9.11 10-31 kg, and the negative charge of the electron has a magnitude of 1.60 10-19 C. (a) What is the relativistic kinetic energy (in joules) of the electron? (b) What is the speed of the electron? Express your answer as a multiple of c, the speed of light in a vacuum.

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