character: Dr. Sounderson
topic: Physics of Sound and its Applications in Medicine
grade: 9
subject: Physics
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character: Professor Wave
topic: Understanding Ultrasonic Waves
grade: 9
subject: Physics
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character: Echo the Explorer
topic: How Ultrasound Imaging Works
grade: 9
subject: Physics
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character: Sonar the Scientist
topic: Medical Use of Sound Waves: From Diagnosis to Treatment
grade: 9
subject: Physics
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