character: Echo Explorer
topic: Sound Propagation in Different Mediums
grade: 10
subject: Physics
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character: Soundwave Sally
topic: Understanding Acoustic Waves
grade: 10
subject: Physics
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character: Medium Master
topic: Effects of Medium on Sound Speed
grade: 10
subject: Physics
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character: Frequency Felix
topic: Frequency and Wavelength in Various Materials
grade: 10
subject: Physics
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