The “kilowatt-hour” is a unit of _______.

A. work

B. energy

C. power

D. work or energy

Force acting over a distance is the definition of

A. Power

B. Work

C. Energy

D. Impulse

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

What is the total energy, in kilowatt-hours, stored in a 12.0-V battery rated at 55.0 A h?