Physics304L - MAPUAINSTITUTEOFTECHNOLOGY DepartmentofPhysics

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MAPUA INSTITUTE OF TECHNOLOGY Department of Physics E303: Transverse Wave:  Frequency of Vibration XXXXXXXXXXXXX 2005XXXXXX XXXX, Group 1 PHY130L-XX
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XXXXXXX  SAMPLE COMPUTATIONS Determining the Frequency of Vibration: Given: Solution: Solve for Tension Solve for frequency cm g in D n cm L g mass g mass wire added pam / 0184 . 0 022 . 0 1 5 . 28 140 5 = = = = = = μ ( 29 ( 29 dynes T s cm g T s cm g g T s cm mass mass T dynes dynes dynes pam added dynes 142100 / 142100 / 980 5 140 / 980 2 2 2 = = + = + = ( 29 ( 29 ( 29 ( 29 Hz f cm g dynes cm f T L n f 75 . 48 / 0184 . 0 142100 5 . 28 2 1 2 = = =
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Percentage Error GUIDE QUESTIONS 1. In the length measurement of vibrating string, the segment close to the stylus  was not included. Why? The segment   close  to  the  stylus  was  not  included  since  it isn’t   a  complete whole; also the vibrations are somewhat irregular.  2. What effect does increasing the tension have on the number of segment  formation? Justify your answer. Increasing the tension will decrease the number of segment formation  since the force required to generate the amplitude will increase with tension.  % 5 . 1 % % 100 5 . 49 75 . 48 5 . 49 % % 100 % = × - = × - = error Hz Hz Hz error AV EV AV error n T T L n f 1 2 = μ
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3. All strings on the acoustic guitar are of the same length. What characteristic  differences   do   they   have   that   gives   them   different   pitch   (different  frequencies)? Discuss  other  procedures  that  can be  done to change  the  frequency. The characteristic differences they have that cause them to have  different frequencies are there diameter which causes them to have different  linear density or μ.  There are also other ways that can be done to change the frequency of 
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Physics304L - MAPUAINSTITUTEOFTECHNOLOGY DepartmentofPhysics

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