Resonance Lab
Williams, Brandon
Physics, Period 1
23 May, 2014
Resonance Lab
Purpose: To determine the speed of sound using the resonance method, temperature method and percent error.
Hypothesis: If the temperature of the room’s 20 degrees C, then using the temperature method, the speed of sound is 344m/s.
Vs – Vo + 0.6m/s T / C
= 332 m/s + .6 m/s (20 C) / C
= 344 m/s
Conclusion:
Using the resonance method the speed was 330 m/s. using the average temperature (23.5 C) and the temperature method, the speed of sound was 345 m/s. the percent error between the two methods was 2.03 %. The temperature value is considered to be the actual value because it uses the constant of 332 m/s.
Materials:
Tuning fork (256Hz)
Tuning Fork (512Hz)
Tuning Fork (1024Hz)
Closed end resonant air column
Rubber Striker
Meter Stick
Thermometer
Procedure:
1. Push in the closed end of the air column until it reaches its shortest length.
2. Strike the tuning fork of 256Hz with a rubber striker, then hold the tuning fork as close to the open end of the air column without touching it.
3. While holding the tuning fork in front of the air column, have a partner adjust the closed end, until the tuning fork can be heard at its loudest point.
4. Once you have found the loudest point, measure the length from the open end of the tube to the point. Record this length on your data table.
5. Repeat steps 1-4 with the same tuning from to find all the resonance lengths throughout the length of the tube.
6. Repeat steps 1-5 for the 512Hz and the 1024Hz tuning forks.
7. Once all the measurements are recorded, measure the temperature of the room with the thermometer.
Data:
Frequency(Hz)
Resonance Length
(cm)
n=1 n=2 n=3 n=4 n=5 n=6 256
33.3
104.1
512
16.6
43.9
83.2
1024
7.6
24.2
40.5
57.4
74.6
90.3
Frequency(Hz)
Wavelength (m)
Speed of π = 1 π = 2
Physics, Period 1
23 May, 2014
Resonance Lab
Purpose: To determine the speed of sound using the resonance method, temperature method and percent error.
Hypothesis: If the temperature of the room’s 20 degrees C, then using the temperature method, the speed of sound is 344m/s.
Vs – Vo + 0.6m/s T / C
= 332 m/s + .6 m/s (20 C) / C
= 344 m/s
Conclusion:
Using the resonance method the speed was 330 m/s. using the average temperature (23.5 C) and the temperature method, the speed of sound was 345 m/s. the percent error between the two methods was 2.03 %. The temperature value is considered to be the actual value because it uses the constant of 332 m/s.
Materials:
Tuning fork (256Hz)
Tuning Fork (512Hz)
Tuning Fork (1024Hz)
Closed end resonant air column
Rubber Striker
Meter Stick
Thermometer
Procedure:
1. Push in the closed end of the air column until it reaches its shortest length.
2. Strike the tuning fork of 256Hz with a rubber striker, then hold the tuning fork as close to the open end of the air column without touching it.
3. While holding the tuning fork in front of the air column, have a partner adjust the closed end, until the tuning fork can be heard at its loudest point.
4. Once you have found the loudest point, measure the length from the open end of the tube to the point. Record this length on your data table.
5. Repeat steps 1-4 with the same tuning from to find all the resonance lengths throughout the length of the tube.
6. Repeat steps 1-5 for the 512Hz and the 1024Hz tuning forks.
7. Once all the measurements are recorded, measure the temperature of the room with the thermometer.
Data:
Frequency(Hz)
Resonance Length
(cm)
n=1 n=2 n=3 n=4 n=5 n=6 256
33.3
104.1
512
16.6
43.9
83.2
1024
7.6
24.2
40.5
57.4
74.6
90.3
Frequency(Hz)
Wavelength (m)
Speed of π = 1 π = 2