2. Charged particles passing through a bubble chamber leave tracks consisting of small hydrogen gas bubbles.
These bubbles make visible the particles' trajectories. In the following figure, the magnetic field is directed into
the page, and the tracks are in the plane of the page, in the directions indicated by the arrows.
a) Which of the tracks (C, D, and/or E) correspond to positively charged particles?
b) If all three particles have the same mass and charges of equal magnitude, which is moving the
slowest?