physics, energy is a property of objects which can be transferred to other objects or converted into different forms, but cannot be created or destroyed.[note 1] The "ability of a system to perform work" is a common description, but it is difficult to give one single comprehensive definition of energy because of its many forms.[1] For instance, in SI units, energy is measured in joules, and one joule is defined "mechanically", being the energy transferred to an object by the mechanical work of moving…
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