An 8-kg mass is in free fall. what is the velocity of the mass after 9 seconds

Why there is no inductive reactance in dc circuits

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

Efficiency is the ratio of to for a system a)power in to power in b)power in to power out c) power out to power out d) power out to power in