Physics

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Across
  1. 4. How fast a wave travels through a medium
  2. 5. Perceived highness or lowness of a sound, depends on the frequency
  3. 6. distance between two corresponding points on a wave
Down
  1. 1. The change in frequency or wavelength due to motion of source
  2. 2. how many cycles pass a point per second
  3. 3. A wave that travels through the earth usually from an earthquake