character: Dr. Lee
topic: The Doppler Effect and Sound Waves
grade: 10
subject: Physics
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character: Professor Smith
topic: Wave Motion and Sound Propagation
grade: 10
subject: Physics
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character: Ms. Johnson
topic: Frequency, Wavelength, and The Doppler Effect
grade: 10
subject: Physics
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character: Mr. Thompson
topic: Applications of the Doppler Effect in Astronomy
grade: 10
subject: Physics
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