second law of thermodynamics

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a law stating that mechanical work can be derived from a body only when that body interacts with another at a lower temperature

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References in periodicals archive ?
That ontological reductionism is logically unfeasible is elucidated further by Uttal's delineation of the 2nd Law of Thermodynamics.The simplified version of this law states, essentially, that as energy is consumed it is converted from highly available forms to forms from which further useful work can no longer be extracted, such that, in effect, energy is decreasing over time (see Prigogine & Stengers, 1984).
In this Editorial we name it by using an undergraduate physical chemistry student's expression for the 2nd Law of Thermodynamics: "You can't get something for nothing." In the report of Bowers and Borts, the principle is manifest by an inability to attain maximum sensitivity without eliminating matrix and contaminant ions.
The driving force for reaching this thermal equilibrium is contained in the 2nd law of thermodynamics. This law states that heat must always move from hotter to colder regions in an irreversible manner.
That heat flows in an irreversible manner is the central theme of the 2nd law of thermodynamics. Indeed, no matter what mechanism will be invoked to transfer heat in nature, it will always be true that the macroscopic transfer of heat occurs in an irreversible manner.
The driving force for this process once again is the 2nd law of thermodynamics and the physical phenomenon involved is expressed in kinetic energy of motion.