1. Five equal-mass particles (A–E) enter a region of uniform magnetic field directed into the page. They follow the trajectories illustrated in the figure. Rank from largest to smallest velocity 2. qvBsin(theta) = ma qvB = ma = m(v^2/r) v = qBr/m 3. Based on their radii, it should be A > B > C=E But what about D? It is neutral, so has no radius because it doesn't go in a circle, but clearly has a velocity despite r = 0. Is the answer indeterminate, then?