The amount of energy within the universe is constant; energy cannot be created or destroyed, only transformed.
A principle that cannot be violated by any physical process, it states that; energy can neither be created nor destroyed, it only changes in form.
energy is neither created nor destroyed in an ordinary chemical or physical process; energy is conserved in all changes except nuclear reactions.
This law states that energy can be transferred from one system to another in many forms, however, it can not be created nor destroyed. Thus, the total amount of energy available in the universe is constant.
energy can be converted from one form to another but can be neither created nor destroyed
The idea that energy can never be created or destroyed, only changed from one form into another
Energy cannot be made or destroyed; energy can only be changed from one place to another or from one form to another.
the fundamental principle of physics that the total energy of an isolated system is constant despite internal changes
This states that energy can neither be created nor destroyed.
Energy cannot be created or destroyed but can be converted from one form to another.
Energy cannot be created or destroyed; it may be changed from one form to another.