Part 1

Find the speed an alpha particle requires to come within 3.7 × 10−14 m of a gold nucleus. Coulomb’s constant is 8.99 × 109 N · m2 /C 2 , the charge on an electron is 1.6 × 10−19 C, and the mass of the alpha particle is 6.64 × 10−27 kg. Answer in units of m/s.

Part 2

Find the energy of the alpha particle. Answer in units of MeV.