The term "joule" is named after an English scientist James Prescott Joule who lived from 1818 to 1889. He discovered that heat is a type of energy.
One joule is the amount of energy needed to lift something weighing one pound to a height of nine inches. So, if you lifted a five-pound sack of sugar from the floor to the top of a counter (27 inches), you would use about 15 joules of energy.
Around the world, scientists measure energy in joules rather than Btus. It's much like people around the world using the metric system of meters and kilograms, instead of the English system of feet and pounds.
Like in the metric system, you can have kilojoules -- "kilo" means 1,000.
1,000 joules = 1 kilojoule = 1 Btu
it would take 2 million joules to make a pot of coffee.
2006-12-09 22:21:10
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answer #1
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answered by Anonymous
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James Prescott Joule
2006-12-09 22:19:54
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answer #2
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answered by Anonymous
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Quoted from "The International System of Units
Its History and Use in Science and Industry"
A distinguished commission of the French Academy of Sciences, including J. L. Lagrange and Pierre Simon Laplace, considered the unit of length. Rejecting the seconds pendulum as insufficiently precise, the commission defined the unit, given the name metre in 1793, as one ten millionth of a quarter of the earth’s meridian passing through Paris. The proposal was accepted by the National Assembly on March 26, 1791.
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The unit of volume, the pinte (later renamed the litre), was defined as the volume of a cube having a side equal to one-tenth of a meter. The unit of mass, the grave (later renamed the kilogramme), was defined as the mass of one pinte of distilled water at the temperature of melting ice. In addition, the centigrade scale for temperature was adopted, with fixed points at 0 C and 100 C representing the freezing and boiling points of water (now replaced by the Celsius scale).
The work to determine the unit of mass was begun by Lavoisier and Hauy and was completed by Gineau and Fabbroni
1Newton = 1 kg-m/sec^2
1,000 Newton-meters = 1 Kilowatt-second = 1,000Coulomb-Volts = 1 Kilojoule.
The Newton-meter was named a Joule in honor of James Prescott Joule, who discovered the relationship between the thermochemical calorie and the Newton-meter, but the unit was actually invented by the commission of the French Academy of Sciences.
2006-12-09 22:46:05
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answer #3
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answered by Helmut 7
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James Prescott Joule (1818-1898) was an English physicist who founded the unit of work known as Joule. He was an expert in the nature of heat (it's relationship to work), conservation of energy, and thermodynamics. Joule also believed in the atomic theory and related his studies to the kinetic theory of heat.
2006-12-09 22:26:32
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answer #4
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answered by skywarp_38 4
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Put the name Joule into your search engine and this will help you.
2006-12-09 23:34:24
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answer #5
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answered by Rozzy 4
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