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GeoGebra지오지브라 클래스룸

Sound waves and the Speed of sound on an Aluminum Rod

If I hold a rod of a solid material in my hand at the ½ way point and stimulate it "properly", it will start to vibrate and produce sound. "Properly" means that the stimulation causes the rod to vibrate at its resonant frequency. If you hear a sound, you have done it "properly".