1. A kg canoe moving to the left at 12.5 m/s makes an elastic head on collision with a raft moving to the right at 16.0 m/s . After the collision the raft moves to the left at - 14.4 m/s . Assuming water simulates a frictionless surface, what is the velocity of the canoe after the collision?

Match each vocabulary term to its definition. 1. electrons neutral subatomic particles found in the nucleus of the atom 2. neutron lowest energy position of an electron in an atom 3. photon the path of an electron around the nucleus of an atom 4. ground state negatively charged, subatomic particles 5. protons packet of energy of specific size 6. element substance with only one type of atom 7. orbital positively charged, subatomic particles found in the nucleus of the atom