watt, W (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/watt
Definition name: watt

Unit name: watt
Latin symbol: W
Display symbol: W

Description: A derived SI unit for power and radiant flux equal to kg·m²·s⁻³ in the 1983 SI units.

"The watt is the power that produces one joule per second." [9th CGPM meeting in 1946]

The watt 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:

{
    "$id": "https://schemas.optimade.org/defs/v1.2/units/si/1983/named/watt",
    "$schema": "https://schemas.optimade.org/meta/v1.2/optimade/physical_unit_definition.json",
    "title": "watt",
    "symbol": "W",
    "display-symbol": "W",
    "description": "A derived SI unit for power and radiant flux equal to kg\u00b7m\u00b2\u00b7s\u207b\u00b3 in the 1983 SI units.\n\n\"The watt is the power that produces one joule per second.\" [9th CGPM meeting in 1946]\n\nThe watt 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 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": "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": "Wikipedia article describing the unit",
            "resource-id": "https://en.wikipedia.org/wiki/Watt"
        }
    ],
    "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^-3"
    },
    "standard": {
        "name": "si",
        "year": 1983,
        "category": "named",
        "symbol": "W"
    },
    "x-optimade-definition": {
        "label": "watt_si_1983_named",
        "kind": "unit",
        "format": "1.2",
        "version": "1.2.0",
        "name": "watt"
    }
}