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

## joule

*J*

Origin of joule

after Joule### Joule

## joule

noun

*Abbr.*

**J**or

**j**

- The International System unit of electrical, mechanical, and thermal energy.
**a.**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.**b.**A unit of energy equal to the work done when a force of one newton acts through a distance of one meter. measurement

Origin of joule

AfterJames Prescott**Joule**

## joule

(*plural* joules)

- 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 5×10*^{19}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}

Named after the English physicist James Prescott Joule.

## joule - Computer Definition

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

A unit of energy in the MKS system. It is equal to 10,000,000 ergs in the CGS system. Surge protectors are often given joule ratings, but this refers only to the amount of energy they can absorb, not what gets through. See CGS system.