Systems Theory – Closed Systems
Closed systems do not interact with the environment
Example: assumption that all masses, particles, and forces that affect the system are included in the model.
law of thermodynamics
Any system which is free of external influences becomes more disordered with time.
Orbital Diagram. The Macclesfield and Portsmouth collections of Newton manuscripts http://www.dspace.cam.ac.uk/handle/1810/194207