College Physics with MasteringPhysics 7th Edition by Jerry Wilson,Anthony Buffa,Bo Lou

تمرين 44

Which one of the following statements is a violation of the second law of thermodynamics: (a) heat flows naturally from hot to cold, (b) heat can be completely converted to mechanical work, (c) the entropy of the universe can never decrease, or (d) it is not possible to construct a perpetual motion engine