character: Dr. Lee
topic: Applications of Sound Waves
grade: 11
subject: Physics
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character: Dr. Smith
topic: Frequency and Amplitude in Sound Waves
grade: 11
subject: Physics
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character: Mr. Johnson
topic: The Doppler Effect and Its Implications
grade: 11
subject: Physics
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character: Ms. Patel
topic: Ultrasound Technology in Medicine
grade: 11
subject: Physics
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