character: Dr. Vibration
topic: The Nature of Vibrational Waves
grade: 9
subject: Physics
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character: Ms. Harmonica
topic: Sound Waves and Their Properties
grade: 9
subject: Physics
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character: Professor Wave
topic: Exploring the Electromagnetic Spectrum
grade: 9
subject: Physics
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character: Captain Reflection
topic: Reflection and Refraction of Waves
grade: 9
subject: Physics
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