Juan argues that when you burn coal, you use up the coal, and hence you use up all of its energy, and this results in a net loss of energy in the universe. How could you fix Juan's argument? The total energy in the universe remains constant because .

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects

A100-watt light bulb illuminates a solar cell. the electricity from the solar cell operates a water pump that delivers 1 watt of power. what is the efficiency of the system?

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