1. The problem statement, all variables and given/known data Consider the mass spectrometer shown schematically in Figure 19.30 (don't have a scanner so I can't put the picture). The electric field between the plates of the velocity selector is 950 V/m, and the magnetic fields in both the velocity selector and the defelection chamber have magnitudes of 0.930 T. Calculate the radius of the path in the system for a singly charged ion with mass m = 2.18x10^-26kg. 2. Relevant equations I'm not sure what to do with the 950 V/m. I also do not know whether a "singly charged ion" means it is a proton or an electron. 3. The attempt at a solution I have attempted to try to find out where I use 950 V/m and what a "singly charged ion" means. I don't think I can go any further without knowing those two pieces of information. I'm not trying to ask for the answer (I've spent 1 hour on this question and I'm willing to spend as much time as it will take to answer it), I just don't know where to start. Thanks.