character: Physics Explorer
topic: Understanding Sound Waves and Frequency
grade: 9
subject: Physics
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character: Wave Master
topic: Properties of Sound Waves
grade: 9
subject: Physics
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character: Frequency Finder
topic: Measuring Sound Frequency
grade: 9
subject: Physics
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character: Sound Scientist
topic: Applications of Sound Waves in Technology
grade: 9
subject: Physics
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