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
The Quest: Energy, Security, and the Remaking of the Modern World The Quest: Energy, Security, and the Remaking of the Modern World The Quest: Energy, Security, and the Remaking of the Modern World is an international bestselling book by energy expert Daniel Yergin. The book was initially published on September 20, 2011 through Penguin Press and is considered to be the follow-up to Yergin’s 1992 Pulitzer Prize winning history of oil, "", and describes the development of the current energy system and prospects for the future. Upon its release, the book received praise and criticism both for its breadth of subject as well as for its impartiality. It is often suggested