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The watt (symbol: W) is a unit of power. In the International System of Units (SI) it is defined as a derived unit of 1 joule per second, and is used to quantify the rate of energy transfer. In dimensional analysis it is described by M L 2 T − 3 {\displaystyle {\mathsf {ML}}^{2}{\mathsf {T}}^{-3}} .
