Also known as the Law of Conservation of Energy, this is the most basic of the three laws.
It states that the total energy of an isolated system will remain constant over time, as long as the system is not affected by external forces.
This is often represented mathematically as ΔE = 0, where ΔE is the total change in energy.
In other words, energy cannot be created or destroyed, only converted from one form to another.
For example, when you burn gasoline, the energy released is not created from nothing, but rather from the chemical energy stored in the gasoline.
You can learn more about the Second Law of Thermodynamics and the Third Law of Thermodynamics.
Or, if you're feeling adventurous, you can explore the World of Entropy.