Sound

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Across
  1. 2. a periodic variable is a measure of it's change in a single period
  2. 3. there are five properties
  3. 4. number of waves that pass a fixed place in a given amount of time
  4. 6. sounds that allows their ordering on a frequency related scale
  5. 8. the spatial period of a periodic wave
  6. 9. an object is the rate of it's position with respect to a frame of reference
Down
  1. 1. the reason why glasses break with vibration
  2. 5. an amount of time
  3. 7. the number of occurrences of a repeating event per unit of time