Pandemic Standing Waves Lab
F. Standing waves
Both ends fixed:
Watch this video: https://www.youtube.com/watch?v=6iKbv_8f5KQ
Go to https://phet.colorado.edu/en/simulation/wave-on-a-string
Click the play button to run the PHET
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"
This is the fundamental frequency (fo) of both ends fixed for this string. The standing waves (resonances) follow a pattern of 1fo, 2fo, 3fo ...
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)
Draw a picture of the first three modes of resonance of both ends fixed
One end fixed:
Watch this video: https://www.youtube.com/watch?v=h7sjZ0ZOkhs
Go to https://phet.colorado.edu/en/simulation/wave-on-a-string
Click the play button to run the PHET
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"
Hit "Restart" at the top
This is the fundamental frequency (fo) of one end fixed for this string. The standing waves (resonances) follow a pattern of 1fo, 3fo, 5fo ...(so 0.21 Hz, 0.63 Hz, and 1.05 Hz)
See if you can get those resonances by changing the frequency. (Hit "Restart" every time you make a change)
Draw a picture of the first three modes of resonance of one end fixed
Both ends free:
Watch this video: https://www.youtube.com/watch?v=QotfmiDDzLw
Draw a picture of the first three modes of resonance of both ends free (sorry)