2objects each of mass 1.5kg are moving in the same straight line but in the opposite directions. the velocity of each object is 2.5m/s before collision, during which they stick together. what will be the velocity of combined object after 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