character: Prof. Johnson
topic: Therapeutic Uses of Sound Waves
grade: 11
subject: Physics
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character: Dr. Smith
topic: Acoustic Engineering and Its Applications
grade: 11
subject: Physics
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character: Ms. Davis
topic: The Science Behind Ultrasound Technology
grade: 11
subject: Physics
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character: Mr. Lee
topic: Wave Properties and Medical Applications
grade: 11
subject: Physics
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