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Physical system

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Title: Physical system  
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Subject: System, Systems science, Physical systems, List of types of systems theory, Ludwig von Bertalanffy
Collection: Concepts in Physics, Physical Systems
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Physical system

Weather map as an example of a physical system

In physics, a physical system is a portion of the physical universe chosen for analysis. Everything outside the system is known as the environment. The environment is ignored except for its effects on itself. In a physical system, a lower probability states that the vector is equivalent to a higher complexity.

The split between system and environment is the analyst's choice, generally made to simplify the analysis. For example, the water in a lake, the water in half of a lake, or an individual molecule of water in the lake can each be considered a physical system. An isolated system is one that has negligible interaction with its environment. Often a system in this sense is chosen to correspond to the more usual meaning of system, such as a particular machine.

In the study of quantum coherence the "system" may refer to the microscopic properties of an object (e.g. the mean of a pendulum bob), while the relevant "environment" may be the internal degrees of freedom, described classically by the pendulum's thermal vibrations.

See also

External links

  • Conceptual vs Physical Systems
  • Research in simulation and modeling of various physical systems
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