Across
- 5. measure of a force's strength
- 7. common name of gases and liquids
- 8. positively charged particle in the nucleus
- 11. motion in a straight line
- 12. phenomenon in which light bounces off a surface
- 13. force acting on a unit area of a surface
Down
- 1. substances which reduce friction
- 2. another name for voice box
- 3. materials which allow electricity to pass through it
- 4. device used to check weather a object is charged or not electroscope
- 6. to and fro and back and forth motion of a object
- 9. frictional force exerted by fluids
- 10. push or a pull on a object