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Chapter 9 and 10, Measured in Metres(m), Only sound is a longitudinal wave…

- - - - Period of Vibration(T) = 1/Frequency of vibrations(Hz)
- - - - Why?
        
        As particles are closely packed, sound energy can be transferred from one particle to another at a faster rate
    - - Larger amplitude-more louder
    - - Higher frequency-higher pitch
    - - Echolocation for Bats and dolphins to locate prey
      - SONAR Technology for boats to know the distance of a shoal of fish underwater