character: Professor John Smith
topic: Applications of Sound in Technology
grade: 9
subject: Physics
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character: Dr. Emily Carter
topic: The Role of Acoustics in Engineering
grade: 9
subject: Physics
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character: Mr. Alex Johnson
topic: Sound Waves and Their Uses in Medicine
grade: 9
subject: Physics
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character: Ms. Sarah Lee
topic: Innovations in Audio Technology
grade: 9
subject: Physics
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