character: Dr. Lee
topic: Applications of Sound in Technology
grade: 9
subject: Physics
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character: Maxwell
topic: Ultrasonics in Medical Imaging
grade: 9
subject: Physics
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character: Dr. Patel
topic: Acoustic Levitation and Its Uses
grade: 9
subject: Physics
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character: Ms. Johnson
topic: Sound Wave Technology in Communication Devices
grade: 9
subject: Physics
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