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A positron (a particle with charge +e and a mass equal to that of an electron), accelerated from rest between two points at a fixed potential...
A positron (a particle with charge +e and a mass equal to that of an electron), accelerated from rest between two points at a fixed potential difference, acquires a speed of 30% that of light. What speed is achieved by a proton accelerated from rest between the same two points? (Neglect relativistic effects)