Re: [Phys-l] Resonant frequency

[John Denker <jsd@av8n.com>]

iOn 09/26/09 05:46, Ken Fox wrote:
> A student at my high school is looking for a resource on the resonant
> frequency of a glass, or a beaker, and the effect of adding water. This is a
> Physics project and a capable student. Can anyone point us to a good
> resource. Much appreciated.

It rings like a bell.

  http://www.google.com/search?q=%22physics+of+bells
  http://www.google.com/search?q=%22sound+of+bells

which lead to

  http://www.ling.upenn.edu/~kingsbur/acoustics.html
  http://www.hibberts.co.uk/
  http://www.btinternet.com/~keltek/sapage1.html

and tons of others.

If you want really hard-core physics info, throw some
physics buzzwords into the search:

  http://www.google.com/search?q=%2Bbells+young%27s+modulus
  http://www.google.com/search?q=%2Bbells+quadrupole+vibration

====

If by any chance you are interested in the resonance of 
the _air_ inside the vessel (as opposed to the deflection
of the solid walls of the vessel) that is much simpler.  
Treat it as  a Helmholtz resonator.  A good reference is 
the book _On the Sensations of Tone_ by some guy named 
Helmholtz.  It's readily available as a Dover reprint.
  http://physics.kenyon.edu/EarlyApparatus/Rudolf_Koenig_Apparatus/Helmholtz_Resonator/Helmholtz_Resonator.html