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Phy12L Experiment 4 - ter bew/LycopodiumPowder ABSTRACT ....

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ure 2.  The Experimental Set-up gure 3.  Vibrating the metal rod  Vibrating the metal rod easuring the temperature of the room eter ube w/ Lycopodium Powder ck osin d ABSTRACT.   The velocity of sound varies with the medium where it travels. The velocity of the sound in a metal rod  was obtained in the experiment by the application of the principles of the resonance. A metal rod that is clamped at its   midpoint is stroked in a lengthwise manner to produce friction and energy in a form of longitudinal wave. A glass tube,   containing lycopodium powder and is closed at its one end, is connected to the metal rod through a disk which is not   touching the tube. When the wave enters the tube, it will agitate the dust inside and forms visible shapes of a wave. At the   same time, the wave resonates and results on producing sound as well as generating constant frequency. Measurements  of the length of the visible wave segments along with the length of the rod are done. The velocity of sound in air is also  measured by recording the temperature of the room. Using the data, the experimental value of v m  is obtained. Afterwards,  a comparison with the theoretical value found in the book and with the value obtained from the elastic property of the   metal is accomplished. For each comparison, we had obtained a percentage error of 0.429% and 1.35%, respectively, but  still, lies within the velocity uncertainty range of  . / ± . / 3460 09 m s 58 31m s . INTRODUCTION During your childhood, have you ever been tried to make  a telephone toy using Styrofoam cup and a very long  string? You noticed that at a certain distance, you still  hear each other. Unlike without it, you still need to shout  just   to   hear  your   friend.   Generally,   the   speed   of   the  sound is faster in solids than in liquids and gases. You  also experienced that when you are in a baseball game  or sat far away from the stage during a concert, you may  have noticed something odd. You saw the batter hit the  ball, but did not hear the crack of the impact until a few  seconds later. Or, you saw the drummer strike the drum,  but it took an extra moment before you heard it. It is due  to light is faster than sound which we are used to see. Sound   surrounds   us   everyday.   We   may   not   notice   it  sometimes. Sound has great importance in our daily life.   We have learned that sound is a form of energy. It is  produced by vibrations. Sound waves are propagated  through longitudinal waves. They are also elastic waves  hence   they   need   a   material   medium   for   their  transmission. They can not be transmitted in vacuum. 
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