character: Ms. Emily Davis
topic: The Science of Sound and Music
grade: 9
subject: Physics
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character: Mr. John Smith
topic: Wave Properties in Music
grade: 9
subject: Physics
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character: Dr. Sarah Lewis
topic: Frequency and Pitch
grade: 9
subject: Physics
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character: Ms. Laura Chen
topic: Sound Wave Interference
grade: 9
subject: Physics
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