character: Mr. Brown
topic: Applications of Sound Waves
grade: 10
subject: Physics
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character: Mr. Johnson
topic: Sound Wave Propagation
grade: 10
subject: Physics
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character: Ms. Smith
topic: Sound Waves in Music
grade: 10
subject: Physics
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character: Dr. Adams
topic: Ultrasonic Waves in Medicine
grade: 10
subject: Physics
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