In the 8th century, a priest in Lanciano, Italy was experiencing doubts about the real presence of Jesus in the Eucharist. In the middle of saying Mass, he said the words of consecration (âThis is my body,â âThis is my blood) and saw the bread and wine transform into real human flesh and blood.
Energy is usually defined as the ability to do work. This is an anthropocentric and utilitarian perspective of energy; however, it is a useful definition for engineering where the aim of machines is to convert energy to work.
In physics, energy is a scalar physical quantity that describes the amount of work that can be performed by a force, an attribute of objects and systems that is subject to a conservation law. Different forms of energy include kinetic, potential, thermal, gravitational, sound, light, elastic, and electromagnetic energy. The forms of energy are often named after a related force. (Wikipedia) Energy units are often used in relation to environmental protection, energy reserves and geopolitics.