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Physics help ch 11 number 21.02

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400 J of energy are transferred to a system in the form of heat while the thermal energy increases by 200 J

How much work is done by the system?(in J)

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  1. Work is the difference between energy in (Ein) and energy  kept by the system (Ecold)

    W= Ein - Ecold

    W= 400 - 200= 200 J

    (Note E in is also can be E hot)

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