Pandemic Standing Waves Lab

F. Standing waves

Both ends fixed:

1. Watch this video: https://www.youtube.com/watch?v=6iKbv_8f5KQ

2. Go to https://phet.colorado.edu/en/simulation/wave-on-a-string

3. Click the play button to run the PHET

4. At the top click "Oscillate", "Fixed End", and at the bottom, set the amplitude to 0.16 cm, and the frequency to 0.41 Hz, the damping to "None" and the Tension to "High"

5. This is the fundamental frequency (f_o) of both ends fixed for this string. The standing waves (resonances) follow a pattern of 1f_o, 2f_o, 3f_o ...

6. See what happens when you change the frequency from 0.41 to 0.82 and 1.23 Hz (Hit "Restart" when you change the frequencies)

7. Draw a picture of the first three modes of resonance of both ends fixed

One end fixed:

1. Watch this video: https://www.youtube.com/watch?v=h7sjZ0ZOkhs

2. Go to https://phet.colorado.edu/en/simulation/wave-on-a-string

3. Click the play button to run the PHET

4. At the top click "Oscillate", "Loose End", and at the bottom, set the amplitude to 0.16 cm, and the frequency to 0.21 Hz, the damping to "None" and the Tension to "High"

5. Hit "Restart" at the top

6. This is the fundamental frequency (f_o) of one end fixed for this string. The standing waves (resonances) follow a pattern of 1f_o, 3f_o, 5f_o ...(so 0.21 Hz, 0.63 Hz, and 1.05 Hz)

7. See if you can get those resonances by changing the frequency. (Hit "Restart" every time you make a change)

8. Draw a picture of the first three modes of resonance of one end fixed

Both ends free:

1. Watch this video: https://www.youtube.com/watch?v=QotfmiDDzLw

2. Draw a picture of the first three modes of resonance of both ends free (sorry)