character: John Doe
topic: Understanding Frequency Ranges in Musical Instruments
grade: 9
subject: Physics
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character: Jane Smith
topic: How Different Instruments Produce Sound Frequencies
grade: 9
subject: Physics
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character: Emily Johnson
topic: The Physics of Sound: Frequency and Musical Instruments
grade: 9
subject: Physics
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character: Michael Lee
topic: Exploring the Frequency Spectrum of Various Instruments
grade: 9
subject: Physics
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