character: Physics Education Portal
topic: Sound Waves and Their Behavior
grade: 11
subject: Physics
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character: Khan Academy
topic: Reflection and Refraction of Waves
grade: 11
subject: Physics
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character: Educational Insights
topic: Understanding Sound Waves
grade: 11
subject: Physics
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character: HyperPhysics
topic: Sound Reflection and Refraction
grade: 11
subject: Physics
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