character: Ms. Johnson
topic: Applications of the Doppler Effect
grade: 11
subject: Physics
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character: Mr. Smith
topic: Redshift in Astronomy
grade: 11
subject: Physics
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character: Dr. Brown
topic: Sound Waves and the Doppler Effect
grade: 11
subject: Physics
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character: Ms. Lee
topic: Medical Applications of Doppler Ultrasound
grade: 11
subject: Physics
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