6. constructive and destructive are types of what?
- reflection
- interference
- diffraction
- refraction
7. a type of longitudinal wave is sound wave?
- True
- False
8. what is the maximum disturbence from its undisrupted position?
- wavelenght
- amplitude
- frequency
9. frequency is the distance between a point on one wave and the same point on another?
- False
- True
10. if a wave has a frequency of 1500Hz and a wavelength of 0.2 what is the speed of the wave?
- 3000
- 3
- 300
- 30 000
- 30
