character: Professor Jane Smith
topic: Introduction to Sound Waves
grade: 11
subject: Physics
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character: Mr. Alex Johnson
topic: Properties of Sound Waves
grade: 11
subject: Physics
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character: Dr. Emily Brown
topic: The Physics of Sound: Frequency and Amplitude
grade: 11
subject: Physics
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character: Ms. Lisa Green
topic: Applications of Sound Waves in Technology
grade: 11
subject: Physics
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