Question

on what factors does the speed of the sound in a medium depend

Answer 1

Speed of sound in a medium depends on

1)density of medium.

2)temperature of medium.

3)humidity

4) direction of wind.

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Answer 2

The speed of sound depend on the density and elasticity of the medium. Since sound travels faster in air than in liquid because density in air is less than in liquid.
We can also consider the following relationship
$speed \: of \: sound = \frac{ elasticity}{density} of \: the \: medium$