Physics, 23.06.2019 05:40 brooklyn674

What is the change in internal energy if 20 j of heat is released from a system and the system does 50 j of work on the surroundings? a. -70 j b. 30 j c. -30 j d. 70 j

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What is the change in internal energy if 20 j of heat is released from a system and the system does...