Understanding Non Equilibrium Systems: Definition and Examples

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Non-equilibrium systems refer to conditions where a system is not in a state of equilibrium, meaning forces or energy levels are not balanced. In mechanical terms, this indicates that the sum of forces acting on the system does not equal zero. Thermal non-equilibrium is characterized by temperature differences within the system. In semiconductor devices, non-equilibrium is identified by the splitting of quasi-Fermi levels. Understanding the context is crucial for determining the specific nature of non-equilibrium in various systems.
germana2006
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What means non equilibrium systems?
 
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A system that is not in equilibrium. o:)

It depends on the problem your dealing with, but can usually be figured out by the context. For example, a system not in mechanical equilibrium means that the sum of the forces does not equal zero. A system outside of thermal equilibrium means that there are temperature differences throughout. A semiconductor device is said to be out of equilibrium when there is a splitting of the quasi-Fermi levels. etc.
 
Topic about reference frames, center of rotation, postion of origin etc Comoving ref. frame is frame that is attached to moving object, does that mean, in that frame translation and rotation of object is zero, because origin and axes(x,y,z) are fixed to object? Is it same if you place origin of frame at object center of mass or at object tail? What type of comoving frame exist? What is lab frame? If we talk about center of rotation do we always need to specified from what frame we observe?

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