jouleid

Jouleid is a unit of energy. It is named after the English scientist James Prescott Joule. One joule is defined as the amount of work done when a force of one newton displaces an object by one meter in the direction of the force. This is equivalent to 10 million ergs in the CGS system of units. In terms of electrical energy, one joule is the energy dissipated as heat when an electric current of one ampere passes through a resistance of one ohm for one second. The joule is also the unit of power multiplied by time, where power is measured in watts and time in seconds. Therefore, one joule is equal to one watt-second. Commonly encountered forms of energy, such as kinetic energy, potential energy, and thermal energy, are all measured in joules. For example, lifting a small apple one meter against Earth's gravity requires approximately one joule of energy. Larger quantities of energy are often expressed in kilojoules (kJ), where 1 kJ = 1000 joules, or megajoules (MJ), where 1 MJ = 1,000,000 joules. The joule is the standard unit of energy in the International System of Units (SI).