Energy cannot be created or destroyed, only transformed from one form to another.
This means that the total amount of energy in a closed system remains constant, even if it changes form (e.g., from chemical energy to heat energy).
However, there are other conservation laws as well, such as:
* Conservation of mass: The total mass in a closed system remains constant, even if it undergoes chemical reactions or changes state.
* Conservation of momentum: The total momentum of a closed system remains constant, even if objects within the system collide.
* Conservation of charge: The total electric charge in a closed system remains constant.
So, what is always true according to the law of conservation depends on which specific law you're talking about. But, the fundamental principle is that something cannot be created or destroyed, only transformed.
