character: Ms. Sarah Johnson
topic: The Role of Frequency in Ultrasound Technology
grade: 9
subject: Physics
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character: Mr. David Smith
topic: Applications of Ultrasound in Medical Diagnostics
grade: 9
subject: Physics
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character: Dr. Emily Wong
topic: Understanding Sound Waves and Their Frequencies
grade: 9
subject: Physics
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character: Ms. Linda Garcia
topic: The Physics Behind Echolocation and Ultrasound
grade: 9
subject: Physics
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