2. Different research theories. Classical mechanics studies the dynamic evolution of objects based on Newton's kinematics equation, quantum mechanics studies the dynamic evolution of microscopic particles based on Schrodinger equation, and relativistic quantum mechanics studies the dynamic evolution of particles with relativistic effect based on Dirac equation. The main means of thermodynamics is statistical method, and the average properties of multi-particle system are obtained.
3. Different roles. Mechanics can clarify the interaction between two atoms and distinguish different kinds of atoms, while thermodynamics studies the average properties of the whole atomic system, and it is difficult to distinguish which kind of atom it is, because statistics cannot be specific to an atom, which is a collective behavior, so the research objects and methods are very different.
Extended data:
Main theory of mechanics
1, three laws of motion.
2. The D'Alembert Principles.
3. Analytical mechanics theory.
4. The theory of continuum mechanics.
5. Basic theory of elastic solid mechanics.
6. Basic theory of viscous fluid mechanics.
Baidu encyclopedia-mechanics
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