character: Ms. Sarah Lee
topic: Frequency and Its Role in Sound
grade: 9
subject: Physics
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character: Mr. James Carter
topic: Waves and Their Properties
grade: 9
subject: Physics
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character: Dr. Emily Chen
topic: The Nature of Sound Waves
grade: 9
subject: Physics
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character: Ms. Laura Kim
topic: Harmonics and Sound Frequency
grade: 9
subject: Physics
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