character: Dr. Sarah Lee
topic: Wave Properties and Their Applications
grade: 9
subject: Physics
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character: Mr. John Smith
topic: Sound Waves and Their Characteristics
grade: 9
subject: Physics
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character: Ms. Emily Davis
topic: Electromagnetic Waves and Their Uses
grade: 9
subject: Physics
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character: Dr. Michael Brown
topic: Wave Interference and Its Applications
grade: 9
subject: Physics
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