character: Dr. Rachel Lee
topic: Physics of Ultrasound Technology
grade: 11
subject: Physics
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character: Professor John Smith
topic: Principles of Sound Waves in Physics
grade: 11
subject: Physics
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character: Dr. Emily White
topic: Applications of Ultrasound in Medical Imaging
grade: 11
subject: Physics
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character: Dr. Alan Brown
topic: Advanced Concepts in The Physics of Waves
grade: 11
subject: Physics
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