Thermodynamics: First Principle

This lecture covers the first principle of thermodynamics, focusing on the general and specific formulations, translations, rotations, and interactions of energy within isolated and interacting systems. It also discusses rigid systems, adiabatically closed systems, and variables such as momentum and angular momentum. The relationship between energy, kinetic energy, internal energy, and their derivatives over time is explored, along with the power of external forces. Emphasis is placed on the concept of internal energy in different reference frames and the mechanical and thermal powers involved.