Across
- 4. object that attracts iron
- 5. ability to do work
- 6. of electric charge
- 10. amount of matter in an object
- 11. push or pull acting on an object
- 14. applied over a distance
- 15. travelling through a medium
- 16. form of energy that makes vision possible
- 17. force attraction between masses
- 18. rate of doing work
- 19. unit of force
- 20. difference in a circuit
Down
- 1. of thermal energy
- 2. transparent material to hat bends light
- 3. per unit area
- 7. traveled per unit time
- 8. disturbance that transfer energy
- 9. of position with time
- 12. force opposing motion
- 13. smallest unit of matter