character: Professor Sound
topic: Sound Waves and Their Properties
grade: 9
subject: Physics
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character: Wavey the Wave
topic: Understanding Wave Frequency and Amplitude
grade: 9
subject: Physics
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character: Echo the Explorer
topic: Reflections and Sound: The Science Behind Echoes
grade: 9
subject: Physics
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character: Doppler Dan
topic: The Doppler Effect and How It Affects Sound Waves
grade: 9
subject: Physics
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