character: Mr. John Smith
topic: Sound Waves and Their Properties
grade: 9
subject: Physics
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character: Ms. Jane Doe
topic: Properties of Waves
grade: 9
subject: Physics
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character: Mr. Alan Green
topic: Wave Behavior in Different Mediums
grade: 9
subject: Physics
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character: Dr. Emily White
topic: Applications of Sound Waves in Technology
grade: 9
subject: Physics
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