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    Physics
    Grade-8
    Easy

    Question

    Which of the following is not a consequence of longitudinal waves propagating through a medium?

    1. Pressure variations
    2. Density variations
    3. Compressions and rarefactions
    4. None of the above

    Hint:

    Compression and rarefaction are created when sound waves propagate.

    The correct answer is: None of the above

      • The longitudinal waves are called pressure waves.
      • Because the propagation of longitudinal waves through a medium involves changes in pressure and density(in the form of compression and rarefaction).
      • Compression is the region of greatest density and high pressure and rarefaction is the region of lowest density and low pressure.
      • So, the correct option is d.

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