Which of the following are formulations of the second law of thermodynamics?
A. It isn't...
Which of the following are formulations of the second law of thermodynamics?
A. It isn't possible to transfer heat from an object at a lower temperature to another object at a higher temperature unless work is done.
B. All systems can convert energy from one form to another useful form with 100% efficiency.
C. It isn't possible to change heat completely into work, with no other change taking place.
D. Entropy of a system decreases over time.
Answers: 2
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