character: Sound Waves
topic: Properties of Sound and Its Behavior
grade: 9
subject: Physics
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character: Frequency
topic: How frequency affects the pitch of sound
grade: 9
subject: Physics
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character: Amplitude
topic: The relationship between amplitude and loudness of sound
grade: 9
subject: Physics
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character: Sound Reflection
topic: Behavior of sound waves when they encounter obstacles
grade: 9
subject: Physics
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