sentences:  Stemming from the 1850s development of the first two laws of thermodynamics, the science of energy have since branched off into a number of various fields, such as biological thermodynamics and thermoeconomics, to name a couple; as well as related terms such as entropy, a measure of the loss of useful energy, or power, an energy flow per unit time, etc.In the past two centuries, the use of the word energy in various "non-scientific" vocations, e.g.social studies, spirituality and psychology has proliferated the popular literature.