What is the First Law of Thermodynamics commonly known as?

The First Law of Thermodynamics is commonly known as the Law of Conservation of Energy. This principle states that energy cannot be created or destroyed in an isolated system; instead, it can only change forms. For example, when energy is transformed from one form to another, such as kinetic energy turning into heat energy, the total amount of energy remains constant. This fundamental concept is essential in various scientific fields and helps explain how energy operates in different systems, including mechanical, thermal, and biological processes. Understanding this law is crucial for analyzing energy flows and transformations in a variety of contexts, which is why it is an important concept in both physics and engineering disciplines.