Thursday, November 3, 2011

Blowing air in bottles

Today, I blew on the top of a glass bottle and realized that I could make sounds by doing this.  This is because when I blew, I created a jet of air that was moving into the bottle. Pressure builds up in the bottle, until the pressure pushes the jet of air back out.  The air that is moving out decreases the pressure in the bottle. This creates a vibration, creating the sound.

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