character: John Doe
topic: Sonar Technology: Exploring Sound Waves
grade: 9
subject: Physics
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character: Jane Smith
topic: Applications of Sound Waves in Marine Navigation
grade: 9
subject: Physics
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character: Mark Johnson
topic: Understanding Sonar: How Sound Waves Help Us Navigate
grade: 9
subject: Physics
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character: Emily Davis
topic: Sound Waves in Oceanography: A Study of Sonar Applications
grade: 9
subject: Physics
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