1. Energy Resources and the Role of Nuclear Energy

Energy is broadly defined as the ability to produce a change from existing conditions. Thus, the term energy implies that a capacity for action is present. The evaluation of energy is done by measuring certain effects that are classified by descriptive names, and these effects can be produced under controlled conditions. For example, mass that is located at a certain position may have a potential energy; if same mass is in motion, then it may possess kinetic energy; or if its characteristics of composition such as temperature or pressure changes, then it is undergoing an energy process called internal energy. Internal energy can be measured by the release of an amount by the change in potential energy experienced by an external load.