character: Mr. Martinez
topic: Applications of Sound Waves in Technology
grade: 11
subject: Physics
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character: Mrs. Johnson
topic: Ultrasound Imaging Techniques
grade: 11
subject: Physics
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character: Dr. Smith
topic: Sonar Technology and Its Uses
grade: 11
subject: Physics
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character: Ms. Lee
topic: Acoustic Levitation in Modern Science
grade: 11
subject: Physics
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