1. (c) A mutual sound has three characteristics namely (i) loudness, (ii) pitch and (iii) quality or timbre. Wavelength is not a characteristic of a musical sound. https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-11/

    (c) A mutual sound has three characteristics namely (i) loudness, (ii) pitch and (iii) quality or timbre. Wavelength is not a characteristic of a musical sound.

    https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-11/

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  2. (b) For sound waves (in general for all longitudinal waves) distance from centre of one compression (or rarefaction) to next centre of compression (or rarefaction) is equal to one wavelength λ. https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-11/

    (b) For sound waves (in general for all longitudinal waves) distance from centre of one compression (or rarefaction) to next centre of compression (or rarefaction) is equal to one wavelength λ.

    https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-11/

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  3. (d) Sound waves can travel in all media whether a solid or a liquid or a gas. https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-11/

    (d) Sound waves can travel in all media whether a solid or a liquid or a gas.

    https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-11/

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