Re: Breaking Glass with Sound

[Ron Ebert <ebert@CITRUS.UCR.EDU>]

At 05:53 AM 6/2/99 -0400, Prof. John P. Ertel wrote:

>  But here is what I can say with certainty:
>
> 1.  Don't try a beaker!  While they are generally of a cylindrical nature
> which makes the calculation of their Helmholtz resonance modes quite easy,
> BUT they have this horrible anisotropy in the lip for pouring --- also,
> the lip curves somewhat outward.  If that wasn't enough, they are made of
> Pyrex --- a material that has a great deal of resistance to fracture (and
> therefore, a great deal of internal loss).

Pyrex beakers are all we ever use, and we have a 100% success rate with
them. In case you missed it the first time around, our demo write-up is at
http://phyld.ucr.edu/Sound%20&%20Wave%20Motion%201/S-118G.htm.

If you are ever in southern California, come by and I'll breaker however
many beakers you like in our sound chamber (well, as many as I have in hand
in stock :))


Ron Ebert
UCR Physics Department
ron.ebert@ucr.edu
http://phyld.ucr.edu