Joule's paddle wheel experiment
By: James Joule (1843)
James Prescott Joule (; 24 December 1818 – 11 October 1889) was an English physicist.
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Joule's paddle wheel experiment (1843)
Performed by: James Joule
James Prescott Joule (; 24 December 1818 – 11 October 1889) was an English physicist.
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What makes Joule's paddle wheel experiment significant?
This experiment is remembered because it gave scientists a way to directly test a theory about nature rather than just theorizing about it. The result either confirmed or challenged what physicists believed at the time.
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About Joule's paddle wheel experiment
James Prescott Joule (; 24 December 1818 – 11 October 1889) was an English physicist. Joule studied the nature of heat and discovered its relationship to mechanical work. This led to the law of conservation of energy, which in turn led to the development of the first law of thermodynamics. The SI unit of energy, the joule (J), is named after him.
He worked with Lord Kelvin to develop an absolute thermodynamic temperature scale, which came to be called the Kelvin scale. Joule also made observations of magnetostriction, and he found the relationship between the current through a resistor and the heat dissipated, which is also called Joule's first law. His experiments about energy transformations were first published in 1843.
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