Crossword Puzzle involving waves/sound waves

Edit Answers
1234567891011121314151617181920
Across
  1. 3. it is the distance between any two successive points
  2. 5. refers to the energy delivered to a unit area of a surface per unit time
  3. 6. are the longest electromagnetic waves
  4. 7. it is a single, unrepeated disturbance
  5. 9. it refers to the maximum amount of displacement of a particle on the medium from its resting position
  6. 13. it is the lowest point of a wave
  7. 14. it is defined as unwanted or damaging, that is, sound that interferes with what people are trying to do or has an adverse effect on health or safety
  8. 16. it requires a medium to propagate
  9. 17. it is a process where it can also destroy cancel cells
  10. 18. it has the longest wavelengths than red light and it is also knows as heat waves
  11. 19. is one in which the particles of the medium are vibrating perpendicularly to the direction of wave propagation
  12. 20. are extremely high frequency radio waves
Down
  1. 1. is one which the particles of the medium vibrate parallel to the direction of the wave propagation
  2. 2. it is an electromagnetic radiation of the shortest wavelength and highest energy
  3. 4. it is the highest point of a wave
  4. 8. it is a longitudinal wave that is created by vibrating objects
  5. 10. it refers to the highness or lowness of a sound
  6. 11. it can travel in a vacuum and in any medium
  7. 12. it is the part of the electromagnetic spectrum visible to the unaided eye
  8. 15. it is the number of waves produced per unit time.