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    • Black and white portrait photo of James Joule 1906.
    Rights: Public domain Published 17 August 2011 Size: 59 KB Referencing Hub media

    James Prescott Joule (1818–1889) was an English physicist who studied the nature of heat and its relationship to mechanical work. The unit of energy, the joule, has been named in his honour.

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      SI derived units

      SI is built on seven fundamental standards called base units. All other SI units are derived by multiplying, dividing or powering the base units in various combinations, For example: mechanical ...

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