Across
- 1. the length of a wave
- 3. the guy that made the laws of motion
- 5. mass/volume
- 8. the force that pulls you towards the center of the Earth
- 9. distance/time
- 10. mass * acceleration
Down
- 2. the type of wave that can travel through a vacuum
- 4. force/area
- 6. unit of frequency
- 7. the crossword puzzle title