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9th Class Science Sound Question Bank Sound

  • question_answer
    Sound travels with a speed of about\[330\text{ }m\text{ }{{s}^{-1}}\]. What is the wavelength of sound whose frequency is 660 Hz?

    A) 5 m                             

    B) 50 m   

    C)        0.5 m  

    D)        500 m

    Correct Answer: C

    Solution :

    Speed of sound, \[{{v}_{s}}=330m{{s}^{-1}}\] Frequency of sound, \[v=660Hz\] \[\therefore \] Wavelength of sound,             \[\lambda =\frac{{{v}_{s}}}{v}=\frac{330}{660}=\frac{1}{2}=0.5m\]


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