character: Ms. Johnson
topic: Resonance in Musical Instruments
grade: 9
subject: Physics
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character: Mr. Smith
topic: Sound Waves and Tuning of Instruments
grade: 9
subject: Physics
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character: Dr. Brown
topic: Applications of Sound Waves in Acoustics
grade: 9
subject: Physics
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character: Professor White
topic: Wave Interference in Music Production
grade: 9
subject: Physics
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