| 41. | However, real systems may behave nearly as an isolated system for finite ( possibly very long ) times.
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| 42. | Is universe a isolated system ? Preceding talk ) 23 : 18, 26 December 2014 ( UTC)
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| 43. | Whenever thermal energy diffuses within an isolated system, temperature differences within the system decrease ( and entropy increases ).
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| 44. | The change in exergy of an isolated system is equivalent, but opposite the value for irreversibility of that system.
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| 45. | However, for given single frames of reference and for isolated systems, the relativistic mass is also a conserved quantity.
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| 46. | The opposite of a mechanically isolated system is a mechanically open system, which allows the transfer of mechanical energy.
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| 47. | They are not perpetual motion machines because they are consuming energy from an external source and are not isolated systems.
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| 48. | The second law of thermodynamics states that the entropy of an isolated system always increases to a maximum equilibrium value.
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| 49. | In isolated systems it is consistently observed that as time goes on internal rearrangements diminish and stable conditions are approached.
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| 50. | The transfer of energy as work into an adiabatically isolated system can be imagined as being of two idealized extreme kinds.
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