Re: [Phys-l] loud bag...physics?

[Brian Blais <bblais@bryant.edu>]

On May 30, 2010, at 1:38 , Bernard Cleyet wrote:

> Again I "point out"  It's not blowing up the bag or stretching, but  
> flexing it.  Here's a clip showing flexing and the resulting  
> "speaking".


that's right...it's just opening the bag, and wrinkling it around a  
little.  if you have a chance to experience it, you should.  it's  
unexpectedly loud, and unlike any bag I've ever dealt with.  like  
silly-putty, it is probably one of those unusual materials.  i just  
realized that I didn't really know what makes a bag loud when  
wrinkled versus quiet, so it got me thinking...

			bb
--
Brian Blais
bblais@bryant.edu
http://web.bryant.edu/~bblais
http://bblais.blogspot.com/