# Why is velocity of sound inversely proportional to square r

1. Sep 5, 2015

### Ajit Kumar

A. Sound is nothing more than a local disturbance whose propagation is facilitated by the collisions between particles

B. The distances between molecules in solids are very small, i.e., solids are more dense - as compared to liquids and gases. Because they are so close, than can collide very quickly.

So why is velocity of sound inversely proportional to square root of density?

2. Sep 5, 2015

### sophiecentaur

You want a reason for a mathematical relationship so the derivation must be mathematical. A search on Google for Speed of sound derivation gives many hits. This link seems to look OK.