character: Ms. Johnson
topic: Understanding Sound Waves and Their Properties
grade: 9
subject: Physics
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character: Mr. Smith
topic: Wave Behaviour and Interaction
grade: 9
subject: Physics
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character: Dr. Lee
topic: Frequency and Pitch in Sound Waves
grade: 9
subject: Physics
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character: Ms. Carter
topic: Exploring Sound Waves in Different Mediums
grade: 9
subject: Physics
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