This lecture covers the fundamental concepts of special relativity, including time dilation, distance contraction, and the transformation of Lorentz. It also delves into the postulates of Einstein's theory, the equivalence of mass and energy, and the dynamics of relativistic particles. Additionally, the lecture explores thermodynamics, focusing on the ideal gas law, kinetic gas theory, and the first and second principles of thermodynamics. The discussion extends to real gases, atmospheric phenomena, and phase transitions, emphasizing the behavior of non-ideal gases. Practical applications and examples are provided to illustrate key principles.