![]() Siemens defined the unit consistently within the then-existing system of practical units as "the power conveyed by a current of an Ampère through the difference of potential of a Volt". ![]() Noting that units in the practical system of units were named after leading physicists, Siemens proposed that watt might be an appropriate name for a unit of power. William Siemens in August 1882 in his President's Address to the Fifty-Second Congress of the British Association for the Advancement of Science. The unit name was proposed initially by C. The watt is named after the Scottish inventor James Watt. A labourer over the course of an eight-hour day can sustain an average output of about 75 watts higher power levels can be achieved for short intervals and by athletes. ![]() Mass times acceleration due to gravity times height divided by the time it takes to lift the object to the given height gives the rate of doing work or power.
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