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karendrinkard
karendrinkard asks:
Q:

How do glasses of water make sound when the rims are rubbed with wet fingers?

In Topics: Science fair
> 60 days ago

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Expert

greenprof2
Apr 3, 2013
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What the Expert Says:

the fingers' small ridges cause the glass to vibrate and the vibration is picked up by the surrounding air and transmitted as sound energy to your ears. In a vacuum you'd hear nothing.

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