# Joule definition

jo͝ol, joul
Frequency:
The basic unit of energy or work in the SI & MKS systems, equal to the amount of work done by a force of one newton acting through a distance of one meter.
noun
(person) 1818-89; Eng. physicist.
proper name
The definition of a joule is the basic unit of electrical energy, and is equal to the work completed when one ampere of current is passed through a resistance of one ohm for one second.

An example of joule is what a scientist would use to measure energy.

noun
In the International System of Units, the derived unit of energy, work and heat; the work required to exert a force of one newton for a distance of one metre. Also equal to the energy of one watt of power for a duration of one second. Symbol: J.

The Greisen–Zatsepin–Kuzmin limit (GZK limit) is a theoretical upper limit on the energy of cosmic rays (high energy charged particles from space) coming from "distant" sources. The limit is 5×1019 eV, or about 8 joules. The limit is set by slowing-interactions of cosmic ray protons with the microwave background radiation over long distances (~163 million light-years). The limit is at the same order of magnitude as the upper limit for energy at which cosmic rays have experimentally been detected. For example, one ultra-high-energy cosmic ray has been detected which appeared to possess a record 50 joules (312 million TeV) of energy (about the same as a 60 mph baseball).WP.

noun
The SI derived unit used to measure energy or work. One joule is equal to the energy used to accelerate a body with a mass of one kilogram using one newton of force over a distance of one meter. One joule is also equivalent to one watt-second.
A unit of electrical energy equal to the work done when a current of one ampere is passed through a resistance of one ohm for one second.
noun
A unit of energy equal to the work done when a force of one newton acts through a distance of one meter.
noun
The work done when a force of one newton applied to a point moves that application point one meter in the direction of application. Joule is named for James Prescott Joule (1818
The International System unit of electrical, mechanical, and thermal energy.
noun

Singular:
joule
Plural:
joules

## Origin of joule

• After James Prescott Joule

### From American Heritage Dictionary of the English Language, 5th Edition

• Named after the English physicist James Prescott Joule.