character: Mr. Alan Green
topic: Wave Behavior in Different Mediums
grade: 9
subject: Physics
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character: Ms. Sarah White
topic: Refraction of Waves
grade: 9
subject: Physics
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character: Mr. John Smith
topic: Sound Waves in Solids and Liquids
grade: 9
subject: Physics
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character: Dr. Emily Brown
topic: Wave Speed in Various Materials
grade: 9
subject: Physics
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