character: Mr. Lee
topic: Acoustic Levitation and Its Uses
grade: 9
subject: Physics
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character: Dr. Smith
topic: The Science of Sound Waves
grade: 9
subject: Physics
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character: Ms. Johnson
topic: Applications of Ultrasonic Technology
grade: 9
subject: Physics
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character: Mr. Brown
topic: Levitation Techniques in Modern Physics
grade: 9
subject: Physics
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