Definition:Watt (Unit)/Base Units
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Definition
The SI base units of the watt are:
- $\mathrm W := \mathrm {kg} \, \mathrm m^2 \mathrm s^{-3}$
where:
- $\mathrm {kg}$ denotes kilograms
- $\mathrm m$ denotes metres
- $\mathrm s$ denotes seconds (of time).
This arises from the definition of the watt as $\mathrm J \, \mathrm s^{-1}$, that is, joules per second.
Sources
- 1976: Ralph J. Smith: Circuits, Devices and Systems (3rd ed.) ... (previous) ... (next): Chapter $1$: Electrical Quantities: Definitions and Laws: Definitions: Table $1$-$2$: Important Derived Quantities