At the same instant that a 0.50-kg ball is dropped from 25 m above earth, a second ball, with a. mass of 0.25 kg, is thrown straight upward from earth’s surface with an initial speed of 15 m/s.. they move along nearby lines and pass each other without colliding. at the end of 2.0 s the. height above earth’s surface of the center of mass of the two-ball system is ?

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