KEY TERMS
1. work (4.1) 6. potential energy 11. watt
2. joule 7. gravitational potential energy 12. horsepower
3. foot-pound 8. conservation of total energy (4.3) 13. kilowatt-hour
4. energy (4.2) 9. conservation of mechanical energy 14. alternative energy source (4.6)
5. kinetic energy 10. power (4.4) 15. renewable energy sources
For each of the following items, fill in the number of the appropriate key term from the preceding list.
c. _ _ _ _ Unit of electrical energy