1.

Give one example when: 1. Heat energy changes to kinetic energy. 2. Kinetic energy changes to heat energy. 3. Sound energy changes to electric energy. 4. Electric energy changes to sound energy. 5. Light energy changes to chemical energy. 6. Chemical energy changes to light energy. 7. Electric energy changes to mechanical energy . 8. Mechanical energy changes to electric energy. 9. Potential energy changes to electric energy. 10. Electric energy changes to potential energy. 11. Mechanical energy to heat energy. 12. Kinetic energy to potential energy. 13. Electrical energy to heat energy. 14. Chemical energy to electrical energy.

Answer»

1. In the automobile engine, heat energy changes to kinetic energy. 

2. When two stones are rubbed against each other, kinetic energy changes to heat energy. 

3. When we speak in front of microphone, sound energy changes to electric energy. 

4. When a loudspeaker works, the electric energy changes to sound energy. 

5. During photosynthesis, light energy changes to chemical energy. 

6. During burning of magnesium, chemical energy changes to light energy. 

7. In an electric motor, electric energy changes to mechanical energy. 

8. In an electric generator, the mechanical energy changes to electric energy. 

9. The P.E. of stored water in dams, changes to electric energy in generators. 

10. When electrolysis is carried out, the electric energy changes to potential energy. 

11. Rubbing of palms. 

12. Throwing up a pebble from the ground. 

13. Electric heater while in use. 

14. Drawing current from an electric cell.


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