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Consider the following statements regarding sound wave.  I. It is a kind of longitudinal wave.  II. It is a mechanical wave.  III. The audible sound wave has the frequency of 20 Hz-20000 Hz.  Which among the above statements is/are correct?

Consider the following statements regarding sound wave.  I. It is a kind of longitudinal wave.  II. It is a mechanical wave.  III. The audible sound wave has the frequency of 20 Hz-20000 Hz.  Which among the above statements is/are correct? Correct Answer All I, II and III

  • The sound wave is a longitudinal mechanical wave. 
  • The audible sound wave has the frequency of 20 Hz -20000 Hz whereas infrasonic waves have the frequency less than 20 Hz. 
  • The ultrasonic waves have a frequency of more than 20000 Hz. 
  • Longitudinal waves are such that the displacement of the medium is in the direction of the propagation of the wave. E.g. sound wave, seismic P-Wave etc. 
  • A mechanical wave is such that it can transfer energy through a medium only. E.g. Jump rope waves, water waves etc. 

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