Posted by Anonymous on Monday, March 5, 2012 at 8:25pm.
A singly charged ion of unknown mass moves in a circle of radius 13.5 cm in a magnetic field of 2.9 T. The ion was accelerated through a potential difference of 3.0 kV before it entered the magnetic field. What is the mass of the ion? (hint: EPE=Vq=KE)
kg

Physics  bobpursley, Monday, March 5, 2012 at 8:31pm
Vq=1/2 m v^2
v= sqrt 2 Vq/m
centripetal force=magneticforce
1/2 m v^2/r= Bqv
solve for mass.
solve for m. 
Physics  Anonymous, Monday, March 5, 2012 at 8:37pm
what is little v and Q