character: Dr. Smith
topic: Wave Properties of Sound
grade: 11
subject: Physics
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character: Ms. Johnson
topic: Sound Waves and Their Behavior
grade: 11
subject: Physics
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character: Mr. Lee
topic: Characteristics of Sound Waves
grade: 11
subject: Physics
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character: Dr. Williams
topic: Applications of Sound Waves in Technology
grade: 11
subject: Physics
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