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James Joule
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James Prescott Joule
James Prescott Joule
FRS
(; (24 December 1818 – 11 October 1889) was an English
physicist
and
brewer
, born in
Salford
, Lancashire. Joule studied the nature of
heat
, and discovered its relationship to
mechanical work
(see
energy
). This led to the
law of conservation of energy
, which led to the development of the
first law of thermodynamics
. The
SI derived unit
of energy, the
joule
, is named after James Joule. He worked with
Lord Kelvin
to develop the absolute scale of
temperature
the kelvin. Joule also made observations of
magnetostriction
, and he found the relationship between the
current
through a
resistor
and the heat
dissipated
, which is now called
Joule's first law
.
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