Waves and Sound: page 1 (Waves 1 to 8: Waves, periodic waves, reflection, refraction)
Waves and Sound: page 2 (Waves 9 to 13: Interference, resonance, standing wave)
Waves and Sound: page 3 (Waves 14 to 15: Diffraction, multiple-choice question & Sound 1 to 3: Speed of sound, organ pipes)
Waves and Sound: page 4 (Sound 4 to 8: Beats, Doppler effect, shock wave, multiple-choice questions)
AP Physics 2: Sound 4: Beats
Resonance and beats: Tuning Forks http://www.youtube.com/watch?v=aCocQa2Bcuc
The 3rd graph has a different horizontal (time) scale than the 1st and 2nd graphs. The 3rd graph’s time scale is larger (zoomed out) so the wave looked more “squished together” than the waves in 1st and 2nd graphs. DrDaveBilliards did this to show how the amplitude of the combined wave changes. For example, the first demo of 500Hz consists of 500Hz waves in all the top 3 graphs, but the 3rd graph have the wave “squished” because of the different scale. Beat Frequency http://www.youtube.com/watch?v=5hxQDAmdNWE
Visualizing Beat Frequencies: http://www.youtube.com/watch?v=I9f6bP3x_yo
AP Physics 2: Sound 5: Doppler Effect
AP Physics 2: Sound 6: Shock Wave
You can hear sonic booms in the video. Glenn Pew also explains a few observations in the video. Supersonic Flight, Sonic Booms http://www.youtube.com/watch?v=gWGLAAYdbbc
Bull whip sonic boom: Sonic boom visualized by Schlieren photography http://www.youtube.com/watch?v=lbomsOPSSII
AP Physics 2: Sound 7: Shock Wave Problem
AP Physics 2: Sound 8: Multiple Choice Questions
Waves and Sound: page 1 (Waves 1 to 8: Waves, periodic waves, reflection, refraction)
Waves and Sound: page 2 (Waves 9 to 13: Interference, resonance, standing wave)
Waves and Sound: page 3 (Waves 14 to 15: Diffraction, multiple-choice question & Sound 1 to 3: Speed of sound, organ pipes)
Waves and Sound: page 4 (Sound 4 to 8: Beats, Doppler effect, shock wave, multiple-choice questions)
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