character: Mr. Lee
topic: The Speed of Sound in Different Mediums
grade: 9
subject: Physics
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character: Ms. Johnson
topic: Exploration of Sound Waves in Water
grade: 9
subject: Physics
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character: Mr. Smith
topic: Comparative Analysis of Sound Speed in Solids and Gases
grade: 9
subject: Physics
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character: Dr. Kim
topic: Factors Affecting Sound Propagation in Various Materials
grade: 9
subject: Physics
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