Roger writes: : Not to contradict any thing you say, but the speed of sound in bubbly : mixture (which one will have in a soda when the pressure is released) : is very low. -- of the order of feet per second. there's still connecting liquid - if it were a dispersed aerosol then yes, it would be slower than solid fluid, but it's considerably faster in liquid than in air , and the more moisture in the air, the faster sound travels for example in dry air the speed is roughly 331m/s, in fog it approaches 402m/s (even though the sound is dispersed) Also, the speed of sound increases in air with increased temperature too, from 346m/s at 25C to 365m/s at 60C comparison - speed of sound in dry air at 30C is around 331m/s muzzel velocity of a .303 is around 780m/s the speed of sound in water is around 1497 m/s karl