Lab11 - PHY 241 University Physics Experiment 12 The Speed...

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PHY 241 University Physics Experiment 12: The Speed of Sound (Resonant Air Column Method) Jacob Matson Lab Partner: Tommy Katona Performed: Apr 6, 2006 Submitted: Apr 20, 2006
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Purpose: To observe resonance in an air column and to use this phenomenon to measure the speed of sound in air. Theory: Sound is composed of compression (longitudinal) waves radiating from a source. Sound waves can travel through solids, liquids, and gases. In solids, such as metals, the speed of sound is several thousands of meters per second. In liquids the speed is somewhat less, but still over 1000 m/s. In air at atmospheric pressure and zero Celsius, the speed of sound is 331 m/s. As the temperature rises, the speed of sound increases. The speed of sound was first measured by Galileo in the early 17 th century by making a loud sound and measuring the time for an echo to return from a nearby hillside. Since that time the speed of sound has been measured, very precisely, in many ways. In today’s experiment we will use the resonating air column method to measure the speed of sound. When a sound wave impinges on an air
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