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## Homework Statement

An electron and a proton are each accelerated through a potential difference of 10MV. find the momentum in MeV/c and the kinetic energy in MeV of each using relativistic formulae and compare with the results of using the classical formulae. Are the particles moving at relativistic speed?

## Homework Equations

p=1/c*sqr((E^2)- (mc^2)^2)

p=ymc^2

p=mv

Ek=1/2mv^2

Rest energy of electron is 0.511MeV

Rest energy of proton is 938MeV

## The Attempt at a Solution

i have found the momentum of the electron to be 10.5Mev/c by p=1/c sqr(((10+.511)^2)-(0.511)^2). And i believe that the kinetic energy of the electron is 10MeV.

The problem arises when i try to calculate the classical momentum and compare it to the relativistic. I think once shown how to do that i can apply it to the proton. But this question has had me going around in circles for quite some time.

I appreciate the help anyone can give me.

Thanks