Proton in Magnetic Field Problem

[whoopie88]

Homework Statement

A proton moves at a speed of 7.0 multiplied by 103 m/s as it passes through a magnetic field of 0.75 T. Find the radius of the circular path. Note that the charge carried by the proton is equal to that of the electron, but is positive.

Homework Equations

F=qvB
Fc=mv^2/r

The Attempt at a Solution

Help!

 

[gneill]

The digits of your charge value look suspiciously like those of the proton mass.

 

[whoopie88]

Oh wow. I can't believe I overlooked that. Thank you so much!