Physics Crossword Puzzle

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Across
  1. 3. the extent of a vibration from the equilibrium
  2. 4. Quantity of mass per unit
  3. 6. waves or vibrations with frequencies that is not audible
  4. 7. relate to
  5. 9. to cause a wave to move through a medium
  6. 10. a decrease in density and pressure in a medium
  7. 11. the lowest point on a wave
  8. 12. Unit of Frequency
  9. 15. relates to length
  10. 16. the time it takes for a wave to pass
  11. 17. the rate which something occurs
  12. 19. the speed
Down
  1. 1. frequencies above 20,000 hertz
  2. 2. the reinforcement of sound via reflection
  3. 5. out of usual location
  4. 8. The composition of any material
  5. 11. how long it takes something to get from point a to b
  6. 13. To lay across
  7. 14. to make more compact
  8. 18. the highest point on a wave