character: Ms. Carter
topic: Sound Waves: Longitudinal Properties
grade: 9
subject: Physics
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character: Mr. Thompson
topic: Wave Behavior: Reflection and Refraction
grade: 9
subject: Physics
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character: Dr. Lee
topic: Sound and Hearing: Frequency and Amplitude
grade: 9
subject: Physics
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character: Ms. Johnson
topic: Resonance: Frequency Effects on Sound Waves
grade: 9
subject: Physics
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