----- Original Message ----- From: "Roger Eichhorn" <eichhorn@xxxxxx> To: "List for Photo/Imaging Educators - Professionals - Students" <photoforum@xxxxxxxxxxxxxxxxxx> Sent: Thursday, December 06, 2007 1:34 AM Subject: Re: exploding soda can matter : I said "bubbly" mixture. There's a world of difference between that : and an aerosol. The speed of sound is proportional to the square : root of the coefficient of elasticity of the mixture to it's : density. The addition of bubbles greatly reduces thia coefficient : while having a small effect on the density. The speed of sound : plunges. In the 60s I had a PhD student at Princeton study the flow : of bubbly mixtures in a convergent-divergent nozzle. Shock waves in : the divergent portion of the nozzle were readily obtained at low : speeds and agreed very well with conventional one-d supersonic flow : theory. : : This is getting pretty far off topic! it sure is! ;) my experience with firearms is generally in the high velocity area where things get pretty screwy, so anyhing's possible there.. having worked in hydrulics for quite a few years I'd guess that even were the can venting furiously from the penetrated side, the compression wave ahead of the bullet would not be permitting to much of what is ahead of the bullet to 'fizz'. cavitating pumps and all karl
