Monday, October 22, 2018

fluid dynamics - How does one derive the equation for the speed of sound?


In my acoustics books I see


$$c^2 = \frac{\mathrm{d}P}{\mathrm{d}\rho}$$



where $c$ is the speed of sound, $P$ is the pressure and $\rho$ is the density. Where does this equation come from? In my books it appears almost as a definition. Could you explain this, or at least point me to an article or a book that addresses this question? Thanks.




No comments:

Post a Comment

classical mechanics - Moment of a force about a given axis (Torque) - Scalar or vectorial?

I am studying Statics and saw that: The moment of a force about a given axis (or Torque) is defined by the equation: $M_X = (\vec r \times \...