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1C_SCJ_5.1_Energy conservation_12

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1C_SCJ_5.1_Energy conservation_12

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1C_SCJ_5.1_Energy(1)_1

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1C_SCJ_5.1_Energy(1)_1

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1C_SCJ_5.1_Energy(2)_2

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1C_SCJ_5.1_Energy(2)_2

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1C_SCJ_5.1_Energy(3)_3

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1C_SCJ_5.1_Energy(3)_3

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1C_SCJ_5.1_energy conversion and steam engine_10

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1C_SCJ_5.1_energy conversion and steam engine_10

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1A_ SCIENCE_CH5.1_Energy changes_Bk_P.90-91

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1A_ SCIENCE_CH5.1_Energy changes_Bk_P.90-91

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1A_ SCIENCE_CH5.1_Energy changes_Bk_P.92-93

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1A_ SCIENCE_CH5.1_Energy changes_Bk_P.92-93

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1A_ SCIENCE_CH5.1_Energy changes_Bk_P.94-96

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1A_ SCIENCE_CH5.1_Energy changes_Bk_P.94-96

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1A_ SCIENCE_CH5.1_Energy changes_Bk_P.97-99

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1A_ SCIENCE_CH5.1_Energy changes_Bk_P.97-99

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