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shaffelder

14 �ݺ�ߣShares 12 Followers

14 �ݺ�ߣShares 12 Followers

Presentations(14)��

Sound waves

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Physics chapter 22 & 23

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Electrostatics

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Mirrors and lenses

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$Reflection and refraction$ $Reflection and refraction$

Reflection and refraction

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Light waves

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