character: Wave Explorer
topic: Characteristics of Sound Waves
grade: 9
subject: Physics
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character: Physics Lab Assistant
topic: Wave Properties
grade: 9
subject: Physics
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character: Sound Engineer
topic: Sound Wave Frequency and Amplitude
grade: 9
subject: Physics
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character: Acoustics Specialist
topic: Reflection and Refraction of Sound Waves
grade: 9
subject: Physics
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