character: Mr. Adams
topic: The Relationship Between Frequency and Pitch
grade: 9
subject: Physics
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character: Ms. Johnson
topic: Understanding Sound Waves and Their Properties
grade: 9
subject: Physics
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character: Dr. Lee
topic: How Frequency Affects Sound Perception
grade: 9
subject: Physics
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character: Mr. Carter
topic: The Physics of Musical Instruments and Sound
grade: 9
subject: Physics
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