For compressible flow this becomes: where y is the ratio of the specific heat at constant pressure to that at constant volume... Science - Page 66 edited by - 1883 Full view - About this book
...adiabatic law. The adiabatic elasticity is greater than the isothermal elasticity by a factor y, which is the ratio of the specific heat at constant pressure to that at constant volume. The speed of sound should thus be given by c = (yp/p)1/2, where p is the pressure and p is the density....
For compressible flow this becomes: where y is the ratio of the specific heat at constant pressure to that at constant volume... 
