System is a word used to define a set of components which interact and function between them. One of the main characteristics of a system is that it acts in a predictable way and is composed by:
- Inputs
- Outputs
- Flows
- Storages
- Sources
- Sinks
Systems can be classified into 3 different categories:
- Open System: Materials and Energy are exchanged across the boundaries of the system.
- Closed System: Energy is exchanged across the boundaries but matter is not
- Isolated System: Neither matter nor energy is exchanged.
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