Problem #1: If the experiment from Figure #2 was run twice, using two different materials for the unknown neutral particles to collide into, derive the equation used by Chadwick that eliminated the neutral particle velocity and that he used to solve for the mass of the neutral particles. Take the ratio of Equation #1 for both species. Let the first nucleus have a recoil velocity of vi and a mass of mi. Let the second nucleus have a recoil velocity of v; and a mass of m2.