unit one

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Across
  1. 4. wave,Type of waves that need a medium to propagate through.
  2. 7. wave,Type of wave that don't need a medium to propagate through.
  3. 8. The maximum displacement of the oscillating body.
Down
  1. 1. time, Time needed by the body to make one complete oscillation.
  2. 2. motion,Type of periodic motion where the body passes throught the fixed point.
  3. 3. wave, Wave formed from crests and troughs. Fequency, Number of complete oscillations per unit time (one sec).
  4. 5. wave, The waves that consist of compressions and rarefactions.
  5. 6. vibration of the medium particles.