Question

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$define \: quantum \: mehanism$
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Answer 1

Answer:

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Quantum mechanics is a fundamental theory in physics that provides a description of the physical properties of nature at the scale of atoms and subatomic particles. ... Most theories in classical physics can be derived from quantum mechanics as an approximation valid at large (macroscopic) scale.

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Answer 2

Quantum mechanics is a fundamental theory in physics that provides a description of the physical properties of nature at the scale of atoms and subatomic particles. It is the foundation of all quantum physics including quantum chemistry, quantum field theory, quantum technology, and quantum information science.