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# prob10 - The Physics of Light Sound PROBLEM SET 10 GENERAL...

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The Physics of Light & Sound Instructions Complete the following exercises in class on Wednesday, June 1. Feel free to work together in groups or to consult with your instructor. These exercises are for your benefit and need not be turned in. Make sure you understand all of the material! 1. A mass of 50 grams is hung from a string-pulley system as illustrated. Suppose the string has a mass per unit length of μ = 0.01 kg/m. If the length of string between the fixed end and the pulley is 1.5 m, what is the fundamental frequency? m Pulley 1.5 m 2. Draw the first 4 harmonics for a string fixed at both ends. Indicate the nodes and antinodes. What are the frequencies of the harmonics based on the wave speed 10 m/s and the string length of 2 m? 3. Draw the first 4 harmonics for an open-closed tube. Indicate the nodes and antinodes. What are the frequencies of the harmonics based with sound speed 340 m/s and tube length 3 m? Summer 2011 1 Problem Set 10 P ROBLEM S ET 10 G ENERAL S CIENCE 121 S UMMER 2011

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4. Draw the first 4 harmonics for an open-open tube.
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