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The behavior of a physical system in nature can be assessed by using a function that can describe the state of the system. Through the state function, predictable system behavior over time or can also observe other physical magnitudes, such as position, momentum, energy, or other quantities that can be measured. In classical mechanics, such functionality can be obtained in various ways. Solutions which declared a state of a classical system can be obtained by equation Newton's Second Law. Quantum theory basically does not like the concept according to Newton's mechanics or electricity dynamics according to Maxwell. The theory of quantum mechanics does not have a general concept of basic principles that can be taught, each physicists studying quantum mechanics is different from the material or a slightly different concept. Quantum theory basically does not like the concept according to Newton's mechanics or electricity dynamics according to Maxwell. The theory of quantum mechanics does not have a general concept of basic principles that can be taught, each physicists studying quantum mechanics is different from the material or a slightly different concept.