Physics

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Across
  1. 2. Determined by the difference of mean and minimum
  2. 6. Propogate by particle motion
  3. 8. Needs a medium
Down
  1. 1. propogate by particle compression
  2. 3. defined as a concentration of force
  3. 4. Will work in medium or vacuum
  4. 5. How many times an event occurs
  5. 7. Physical distance of one compression to the next