character: Ms. Rivera
topic: Sound Waves and Their Applications
grade: 9
subject: Physics
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character: Dr. Thompson
topic: Types of Waves in Physics
grade: 9
subject: Physics
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character: Mr. Patel
topic: The Doppler Effect and Real-world Applications
grade: 9
subject: Physics
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character: Ms. Johnson
topic: Sound Waves: Frequency, Amplitude, and Speed
grade: 9
subject: Physics
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