PhysicsLAB Lab
Speed of Sound in Copper

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In this experiment, we will use a Kundt's Tube to calculate the speed of sound in a copper rod. Our apparatus includes a glass tube containing a layer of fine cork dust, a wooden dowel, and a copper rod. The copper rod will be inserted into the glass tube and its midpoint securely clamped. The end of the rod inside the tube has a vibrating disk which will agitate the air and the cork dust in the resonating chamber when the outer end of the rod is excited.
We will collect the following data: the lengths of the loop in the copper rod and several loops in the cork dust as well as the temperature in the room.
temperature of room (in ºC) 

length of copper rod (in meters) 

length of first loop in dust (in meters) 

length of second loop in dust (in meters) 

average length of a loop in the resonating air chamber (in meters) 

average wavelength of sound in air (in meters) 

calculated speed of sound in air (in m/sec) 

frequency of sound in air (in hz) 

frequency of sound in copper (in hz) 

wavelength of fundamental frequency in copper (in meters) 

calculated speed of sound in copper (in m/sec) 

Error Analysis:
The actual speed of sound in copper is 3500 m/sec. Calculate your experimental percent error. 

Before submitting your reports, make sure that all of your numerical answers are expressed in terms of the stipulated units.

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