character: Dr. Lee
topic: The Speed of Sound in Various Materials
grade: 9
subject: Physics
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character: Dr. Johnson
topic: Properties of Waves in Different Mediums
grade: 9
subject: Physics
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character: Ms. Carter
topic: Understanding Sound Waves and Their Behavior
grade: 9
subject: Physics
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character: Mr. Patel
topic: Impact of Temperature on Sound Speed
grade: 9
subject: Physics
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