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mechanical engineering thermodynamics
1. Which of the following is the correct statement of the second law of thermodynamics?
(A): all of the above
(B): It is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work.
(C): It is impossible to transfer heat from a body at a lower temperature to a higher temperature, without the aid of an external source.
(D): There is a definite amount of mechanical energy, which can be obtained from a given quantity of heat energy.
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