character: Ms. Ramirez
topic: Fundamentals of Waves and String Instruments
grade: 9
subject: Physics
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character: Mr. Johnson
topic: Sound Waves and Their Properties
grade: 9
subject: Physics
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character: Ms. Patel
topic: Vibration and Frequency in String Instruments
grade: 9
subject: Physics
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character: Dr. Brown
topic: The Physics of Musical Instruments
grade: 9
subject: Physics
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