character: Dr. Mark Johnson
topic: The Use of Echolocation in Marine Species
grade: 11
subject: Physics
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character: Dr. Sylvia Hart
topic: The Physics of Sound Waves in Water
grade: 11
subject: Physics
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character: Professor Emily Carter
topic: Sonar Technology and its Applications in Marine Biology
grade: 11
subject: Physics
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character: Dr. Liam Nguyen
topic: Comparative Analysis of Echolocation in Bats and Dolphins
grade: 11
subject: Physics
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