Thermodynamics
Thermodynamics is a branch of physics that studies the effects of temperature, pressure, and volume change on physical systems at a macroscopic scale. This study was conducted through statistical analysis of the collective movement of its particles. Generally, "heat" means "energy in transition" and "dynamic" is related to "movement"; therefore, thermodynamics actually examines the energy movement and how energy causes movement. Historically, thermodynamics evolved from the need to improve the efficiency of the initial steam engines.