joule, J (unit)

This page documents an OPTIMADE Unit Definition. See https://schemas.optimade.org/ for more information.

ID: https://schemas.optimade.org/defs/v1.2/units/si/1983/named/joule
Definition name: joule

Unit name: joule
Latin symbol: J
Display symbol: J

Description: A derived SI unit for energy, work, and heat equal to kg·m²·s⁻² in the 1983 SI units.

"The joule is the work produced by a newton whose point of application moves one meter in the direction of the force." [9th CGPM meeting in 1946]

The joule was defined at the 9th CGPM Meeting in 1946, included in SI at the 11th CGPM meeting in 1960, resolution 12, implicitly redefined via the redefinition of the second at the 13th CGPM Meeting in 1967, resolution 1, and again implicity redefined via the redefinition of the metre at the 17th CGPM meeting (1983), resolution 1.

Resources:

Formats: [JSON] [MD]

JSON definition:

{
    "$id": "https://schemas.optimade.org/defs/v1.2/units/si/1983/named/joule",
    "$schema": "https://schemas.optimade.org/meta/v1.2/optimade/physical_unit_definition.json",
    "title": "joule",
    "symbol": "J",
    "display-symbol": "J",
    "description": "A derived SI unit for energy, work, and heat equal to kg\u00b7m\u00b2\u00b7s\u207b\u00b2 in the 1983 SI units.\n\n\"The joule is the work produced by a newton whose point of application moves one meter in the direction of the force.\" [9th CGPM meeting in 1946]\n\nThe joule was defined at the 9th CGPM Meeting in 1946, included in SI at the 11th CGPM meeting in 1960, resolution 12, implicitly redefined via the redefinition of the second at the 13th CGPM Meeting in 1967, resolution 1, and again implicity redefined via the redefinition of the metre at the 17th CGPM meeting (1983), resolution 1.",
    "resources": [
        {
            "relation": "Definition at the 9th CGPM meeting (1948)",
            "resource-id": "https://www.bipm.org/en/committees/cg/cgpm/9-1948"
        },
        {
            "relation": "Definition and establishment of the SI unit system at the 11th CGPM meeting (1960), resolution 12.",
            "resource-id": "https://www.bipm.org/en/committees/cg/cgpm/11-1960/resolution-12"
        },
        {
            "relation": "Redefinition of the metre at the 17th CGPM meeting (1983), resolution 1",
            "resource-id": "https://www.bipm.org/en/committees/cg/cgpm/17-1983/resolution-1"
        },
        {
            "relation": "Redefinition of the second in the 13th CGPM Meeting (1967), resolution 1",
            "resource-id": "https://www.bipm.org/en/committees/cg/cgpm/13-1967/resolution-1"
        },
        {
            "relation": "Wikipedia article describing the unit",
            "resource-id": "https://en.wikipedia.org/wiki/Joule"
        }
    ],
    "defining-relation": {
        "base-units": [
            {
                "symbol": "kg",
                "id": "https://schemas.optimade.org/defs/v1.2/units/si/1960/base/kilogram"
            },
            {
                "symbol": "m",
                "id": "https://schemas.optimade.org/defs/v1.2/units/si/1983/base/metre"
            },
            {
                "symbol": "s",
                "id": "https://schemas.optimade.org/defs/v1.2/units/si/1967/base/second"
            }
        ],
        "base-units-expression": "kg*m^2*s^-2"
    },
    "standard": {
        "name": "si",
        "year": 1983,
        "category": "named",
        "symbol": "J"
    },
    "x-optimade-definition": {
        "label": "joule_si_1983_named",
        "kind": "unit",
        "format": "1.2",
        "version": "1.2.0",
        "name": "joule"
    }
}