Re: spouting resonance bowl

[William Beaty <billb@ESKIMO.COM>]

On Thu, 10 Jan 2002, kyle forinash wrote:

> Well I bought one of those resononce bowls that are suppose to spout
> water when you rub the handles. I saw it working in a movie so I don't
> think I was taken (yet!) but I can't get it to work. Can anyone point me
> in the right direction? (It did not come with directions.)

It works like rubbing a wineglass rim... therefore the palms of your hand
must first be degreased.  If you can get your hands to "squeak" when
rubbed on the polished metal, then the stick-slip will drive the whole
thing in one of the resonance modes.

Question for all: are the "spouted" droplets coming from the peaks of
soliton surface waves?  Perhaps a strobe light could detect whether the
standing waves are sloshing at 1/2 the frequency of the vibrating bowl.


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