character: Mr. Smith
topic: Properties of Sound Waves
grade: 11
subject: Biology
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character: Ms. Johnson
topic: Wave Frequency and Amplitude
grade: 11
subject: Biology
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character: Dr. Lee
topic: Sound Wave Propagation in Different Mediums
grade: 11
subject: Biology
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character: Mr. Patel
topic: Applications of Sound Waves in Medicine
grade: 11
subject: Biology
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