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kinetic energy °Ê¯à
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kinetic theory ¤À¤l¹B°Ê½×
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kinetic theory of gases ÉaÊ^¤À¤l¹B°Ê½×
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law of conservation of momentum °Ê¶q¦uùÚ©w«ß
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law of refraction §é®g©w«ß
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