Impact of external energy in first principle?

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In summary, the impact of external energy in first principle is a significant factor in determining the behavior and properties of a system. This external energy can come from various sources, such as heat, light, or mechanical forces, and can greatly influence the structure, dynamics, and stability of a system. By understanding and controlling this external energy, scientists and engineers can manipulate and improve the performance of materials and systems for various applications. Additionally, the study of external energy in first principle has led to advancements in fields such as materials science, chemistry, and physics, and continues to be an important area of research.
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jeanB
The thermodynamic generally uses this form for first principle: dE=dW+dQ where E is internal energy. Lot of laws, for example in the second principle scope (properties of entropy) are using this form. What impact if external energy is taken into account? so dEe+dEi=dW+dQ.
Of course, during next hours, i will develop what happens on entropy, based on Planck's point of view, but I'm curious to know ideas you could have...
 
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