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physics

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which is false?

Consider the following processes:

I.
Energy flows as heat from a hot object to a colder object

II.
Work is done on a system and an equivalent amount of energy is rejected as heat by the system

III.
Energy is absorbed as heat by a system and an equivalent amount of work is done by the system

is it just II?

  • physics - ,

    III is false also. There is no need for work to be done, it could have been stored as potential energy (like in mech or chem energy).

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