In which of the following medium speed of sound is maximum?

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Air

Steel

Aluminium

Hydrogen gas

answer is C.

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Detailed Solution

The speed of sound is maximum in aluminium.
A type of longitudinal wave is sound. It propagates by pushing the particles of the present material medium. The density of the medium through which sound travels determines its speed. The higher the density of the medium, the faster sound propagates. Solid molecules are extremely densely packed.
Solid molecules collide more easily because they are closer together.
As a result, solids will have less resistance to sound propagation.

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