character: Mr. White
topic: Understanding Waves and Their Applications in Technology
grade: 9
subject: Physics
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character: Emily Johnson
topic: Introduction to Wave Properties
grade: 9
subject: Physics
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character: David Lee
topic: Real-World Applications of Sound Waves
grade: 9
subject: Physics
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character: Sara Kim
topic: Electromagnetic Waves in Communication
grade: 9
subject: Physics
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