James Prescott Joule

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James Prescott Joule was born December 24, in 1818.

James Joule was born into the wealthy brewing family of Benjamin and Alice Joule.

In 1847 James Joule married Amelia Grimes, a daughter of the Liverpool Comptroller of Customs.

James Joule and Amelia had three children: Benjamin Arthur (born 1849), Alice Amelia (born 1852) and a son who died in 1854 along with his wife during child birth.

In 1843 James Joule read his paper to the British Association, entitled "On the Calorific Effects of Magneto-Electricity and on the Mechanical Value of Heat." This paper described the physical constant that showed that heat was a form of energy. This constant is known as "J", or "Joule's Equivalent." The unit of heat, work and internal energy are measured in joules (J).

James Prescott Joule died October 11 in 1889. James Joule is buried in Westminster Abbey along with other famous people.

Those Who Inspired

John Dalton

James Joule was tutored as a young boy by John Dalton:

John Dalton was a well known Chemist and Physicist.

John Dalton was born September 6 in 1766 and died July 27 in 1844.

John Dalton is most recognized for his findings, which later is known as "the atomic theory".

The atomic theory is the theory of the nature of matter. It states that: "all matter is composed of atoms."

Lord Kelvin

James Joule worked with Lord Kelvin on experiments, which later became know as the Joule-Thomson Effect:

Lord Kelvin was a well known Mathematical Physicist.

The well known "Lord Kelvin" born as William Thomson, June 26 in 1824 and later died December 17 in 1907.

William Thomson later became the 1st Baron Kelvin, he was known as "Lord Kelvin."

Lord Kelvin is most recognized for his work in thermodynamics and Kelvin temperature scale.

Rudolf Julius Emanuel Clausius

James Joule was inspired by the work of Rudolf Julius Emanuel Clausius:

Rudolf Julius Emanuel Clausius was a Physicist and a Mathematician.

Rudolf Julius Emanuel Clausius was born January 2 in 1822, and died August 24 in 1888.

Rudolf Julius Emanuel Clausius is most recognized for his work in thermodynamics.

Rudolf Julius Emanuel Clausius introduced the concept of entropy.

The Experiments (Known Today as Research)

Paddle Wheel Experiment

James Joule's Paddle Wheel Experiment determined the existence of a relation between heat and mechanical work. He established this by a method involving the churning water in a calorimeter by means of paddles driven by various falling weights. Through this experiment James Joule established what we call today the First Law of Thermodynamics.

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