character: Tommy
topic: Acoustic Waves in Sonar Systems
grade: 11
subject: Physics
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character: James
topic: Principles of Sound Propagation
grade: 11
subject: Physics
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character: Lisa
topic: Applications of Sonar Technology
grade: 11
subject: Physics
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character: Robert
topic: Frequency and Wavelength in Acoustic Systems
grade: 11
subject: Physics
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