character: Ms. Jane Doe
topic: Introduction to Waves
grade: 9
subject: Physics
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character: Mr. John Smith
topic: Fundamentals of Sound Waves
grade: 9
subject: Physics
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character: Dr. Emily White
topic: Light Waves: Properties and Applications
grade: 9
subject: Physics
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character: Ms. Sarah Johnson
topic: Mechanical Waves and Their Characteristics
grade: 9
subject: Physics
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