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Musical Goblet

2 wine glasses with someone rubbing the tops

PIRA: 3D40.50

Wine glasses will be made to vibrate by running a wet finger along the rims.  The pitch of each glass is determined by the amount of water in the glass.  With very little water, almost all of the glass vibrates, and the pitch is low.  With lots of water, much less of the glass vibrates, and the pitch is high.  In general, larger glasses will make lower notes, and smaller glasses will make higher notes.