Joule definition

jo͝ol, joul
joules
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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.
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(person) 1818-89; Eng. physicist.
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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.

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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.

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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.
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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.
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A unit of energy equal to the work done when a force of one newton acts through a distance of one meter.
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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
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The International System unit of electrical, mechanical, and thermal energy.
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Other Word Forms

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.

    From Wiktionary

Joule Sentence Examples

  • P. Joule had assumed to be the same at all temperatures.

  • From data contained in Joule's paper it may be calculated that the strongest external field Ho produced by his coil was about 126 C.G.S.

  • Peltier (1834) that heat is absorbed at the junction of two metals by passing a current through it in the same direction as the current produced by heating it, was recognized by Joule as affording a clue to the source of the energy of the current by the application of the principles of thermodynamics.

  • The best-known of Joule's experiments was that in which a brass paddle consisting of eight arms rotated in a cylindrical vessel of water containing four fixed vanes, which allowed the passage of the arms of the paddle but prevented the water from rotating as a whole.

  • It has been proposed to adopt the joule, with the symbol j, as thermochemical unit for small quantities of heat, large amounts being expressed in terms of the kilojoule, Kj =100o j.

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