Postlab 10 - 5. Why did we use a long string length for MS...

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Lab 10: Standing Waves 1. The fundamental mode of a given string under a given tension is at frequency f 1 . If we pulled the string 4 times tauter, what is now the frequency of the new fundamental mode in terms of the old f 1 ? Click here to enter text. 2. If you replaced the string with a light-weight thread of 1/9 th its mass per unit length, how would the frequency change? Click here to enter text. 3. How are the frequencies of various modes ( n =1 is the first mode, n =2 is the second) related? The answer should be of the form f n =something with an f 1 in it.? Click here to enter text. 4. What is the “end effect” in this experiment? What part of your graph shows this end effect? Click here to enter text.
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Unformatted text preview: 5. Why did we use a long string length for MS and LS? Click here to enter text. 6. Suppose we have a 42.2 kg mass hanging on a steel wire over a pulley, like in our experiment. We have 0.8 mm diameter wire, made out of carbon steel (mass density = 7860 kg/m 3 ). What is the linear mass density? Click here to enter text. The length that is free to vibrate is 64 cm. If plucked or struck, assume you will mostly hear the n=1 standing wave. What is the fundamental mode (n=1) for the string? Click here to enter text. If you were standing near the string, what note would you hear? (pick closest one) ( will help Click here to enter text....
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This note was uploaded on 03/22/2012 for the course PHYS 302L taught by Professor Tsoi during the Spring '10 term at University of Texas at Austin.

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