character: Dr. Smith
topic: Comparative Speed of Sound in Solids, Liquids, and Gases
grade: 9
subject: Physics
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character: Professor Jones
topic: Properties of Waves in Different Mediums
grade: 9
subject: Physics
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character: Ms. Taylor
topic: Understanding Sound Waves: Frequency and Velocity
grade: 9
subject: Physics
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character: Mr. Lee
topic: Acoustic Properties of Materials
grade: 9
subject: Physics
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