When sound waves travel from a rarer gaseous medium to a denser gaseous medium, its speed __.

decreases

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remain constant

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increases

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may increase or decrease

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Solution

The correct option is C
increases

In a gaseous medium, the speed of sound is inversely proportional to the density of the medium. The speed of sound decreases when the density increases. Hence, if the sound wave is travelling from a less denser to a more denser medium, its speed will decrease.

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When sound waves travel from a rarer gaseous medium to a denser gaseous medium, its speed __.

The correct option is C increases In a gaseous medium, the speed of sound is inversely proportional to the density of the medium. The speed of sound decreases when the density increases. Hence, if the sound wave is travelling from a less denser to a more denser medium, its speed will decrease.

The correct option is C
increases

In a gaseous medium, the speed of sound is inversely proportional to the density of the medium. The speed of sound decreases when the density increases. Hence, if the sound wave is travelling from a less denser to a more denser medium, its speed will decrease.