1. The problem statement, all variables and given/known data[/b An electron has a kinetic energy of 5.80 10-17 J. It moves on a circular path that is perpendicular to a uniform magnetic field of magnitude 5.10 10-5 T. Determine the radius of the path? I know KE = 1/2mv^2 Using KE = 1/2mv^2 and saying KE = 5.8 x 10^-17, and m = 9.10938 x 10^-31 KG I get that v= 11284559 m/s Then using F = mv^2/r, I end up with an answer of 2.27 x 10^-12 m. It tells me this answer is wrong. Any help would be great.