character: Dr. Lee
topic: Frequency and Pitch in Sound Waves
grade: 9
subject: Physics
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character: Ms. Kim
topic: The Relationship Between Frequency and Wavelength
grade: 9
subject: Physics
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character: Mr. Johnson
topic: How Sound Waves Travel Through Different Mediums
grade: 9
subject: Physics
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character: Dr. Smith
topic: Understanding the Doppler Effect in Sound Waves
grade: 9
subject: Physics
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