Energy It is equal to the energy expended (or work done) in applying a force of one newton through a distance of one metre. However energy is also expressed in many other units not part of the SI, such as ergs, calories, British Thermal Units, kilowatt-hours and kilocalories, which require a conversion factor when expressed in SI units. The SI unit of energy rate (energy per unit time) is the watt, which is a joule per second. Thus, one joule is one watt-second, and 3600 joules equal one watt-hour. The CGS energy unit is the erg and the imperial and US
Insanity in Ancient and Modern Life which his work was received. His books, including the Insanity in Ancient and Modern life, are often cited and referred to in scientific literature about sociocultural causes and influential factors contributing to insanity in the past and present. Additionally, he is often minorly mentioned in historical books about the emergence of psychology as a discipline. Tuke was among the first persons to recognize an increase in the prevalence of insanity by making use of statistics to identify possible causes, which he clarifies in great detail in "Insanity in Ancient and Modern Life." As many of his other books, the book