出典:Wiktionary
出典:Wikipedia
出典:『Wikipedia』 (2011/06/02 16:32 UTC 版)
The heat death of the universe is a suggested fate of the universe, in which the universe has diminished to a state of no thermodynamic free energy and so can no longer sustain motion or life. Heat death doesn't imply any particular absolute temperature; it only requires that temperature differences or other process may no longer be exploited to perform work. In the language of physics, the universe has reached maximum entropy. The hypothesis of heat death stems from the 1850s ideas of William Thomson, 1st Baron Kelvin who extrapolated the views of the theory of heat as mechanical energy loss in nature, as embodied in the first two laws of thermodynamics, to the processes in the universe.