character: Mr. Sound
topic: Exploring Sound Waves and Their Properties
grade: 9
subject: Physics
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character: Dr. Wave
topic: Introduction to Wave Physics
grade: 9
subject: Physics
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character: Professor Vibration
topic: Sound Wave Frequencies and Tones
grade: 9
subject: Physics
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character: Ms. Echo
topic: Reflection and Refraction of Sound Waves
grade: 9
subject: Physics
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