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Il y a 6 jours · Le joule se définit en référence à d’autres unités de masse, de longueur et de temps du Système international, il est une unité dite dérivée (kg.m2.s-2). Le joule tire son nom d’un physicien anglais James Prescott Joule (1818-1889).
- Énergie
Le système international a choisi, comme unité pour...
- Mesure de la radioactivité
1 Gy = 1 joule par kilo de matière irradiée. Lorsque le...
- Énergie
2 juil. 2024 · The joule is named after James Prescott Joule. As with every SI unit named for a person, its symbol starts with an upper case letter (J), but when written in full, it follows the rules for capitalisation of a common noun ; i.e., joule becomes capitalised at the beginning of a sentence and in titles but is otherwise in lower case.
Il y a 4 jours · At that meeting, he heard James Prescott Joule making yet another of his, so far, ineffective attempts to discredit the caloric theory of heat and the theory of the heat engine built upon it by Sadi Carnot and Émile Clapeyron. Joule argued for the mutual convertibility of heat and mechanical work and for their mechanical equivalence.
18 juin 2024 · Jeudi 6 juin 2024, Amphithéâtre James Prescott Joule, Ecole Centrale Méditerranée, Marseille
29 juin 2024 · In a paper published in 1843, James Prescott Joule first demonstrated a means of measuring the energy transferred between different systems when work is done thereby relating Nicolas Clément's calorie, defined in 1824 as "the amount of heat required to raise the temperature of 1 kg of water from 0 to 1 °C at 1 atmosphere of ...
21 juin 2024 · The Copley Medal today is struck in silver gilt; the obverse bears a likeness of Sir Godfrey Copley, and the reverse shows the arms of the Royal Society. The award of the medal is accompanied by a gift of £25,000. Each year the award alternates between the physical and biological sciences.
22 juin 2024 · James Prescott Joule also claimed that there was a relationship between mechanical motion and heat, and his idea became the basis for the science of thermodynamics. In 1847, at a meeting of the British Association for the Advancement of Science, Thomson first heard Joule’s theory about the interconvertibility of heat and motion.
