character: Mrs. Lee
topic: Sound Wave Behavior and Interference
grade: 9
subject: Physics
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character: Mr. Johnson
topic: Wave Properties and Behavior
grade: 9
subject: Physics
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character: Ms. Smith
topic: Principles of Wave Interference
grade: 9
subject: Physics
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character: Dr. Brown
topic: Applications of Sound Waves in Technology
grade: 9
subject: Physics
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