Among air, water, and iron, sound travel faster in ____.

air

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water

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iron

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both air and water

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Solution

The correct option is C iron
The speed of sound depends on the density and the elasticity of the medium. In general, sound travels faster in liquids than in gases and faster in solids than in liquids. Also, speed of sound increase with the stiffness of the medium. The elasticity of iron is much higher than water. Therefore, the speed of sound is greater in iron.

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