character: Wavy Wanda
topic: Reflection and Refraction of Sound
grade: 9
subject: Physics
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character: Soundwave Sammy
topic: Understanding Sound Waves
grade: 9
subject: Physics
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character: Echo Emily
topic: The Physics of Echoes and Sound Reflection
grade: 9
subject: Physics
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character: Refracto Ray
topic: The Principles of Sound Refraction
grade: 9
subject: Physics
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