James Prescott Joule (1818-1889) was born into a wealthy Manchester family. He initially was educated at home, before being tutored, at the age of sixteen, by the eminent Manchester scientist John Dalton. Joule soon began to conduct independent research at a laboratory built in the cellar of his father's home. By the 1840's, scientists had realized that heat, electricity, magnetism, chemical change and the energy of motion were all inter convertible. Joule was extremely involved with this work, and between 1837 and 1847, he established the principle of conservation of energy, and the equivalence of heat and other forms of energy. Joule's accomplishments were not limited to those things we today associate with the word "research". Much of what comes from experimental investigations results in practical devices and new technologies. Joule, James Prescott (Salford, Lancashire1818 - It knows them, Cheshire1889), famous British physicist for its studies in thermodynamics and electricity matter. Formed like self-taught, in the course of its searches on the heat emitted from a circuit electrical worker, it second formulated the law - today famous like "law of Joule" - which the amount of heat produced every second in a conductor from one current electrical worker is proporziona them to the resistance of the conductor and the square of the current.Joule experimentally verified the principle of conservation of the energy in a concerning study the transformation of the mechanical energy in thermal energy and succeeded to determine the numerical relation between the thermal energy and the mechanical energy, or "mechanical equivalent of the heat". The called energy and man-work unit joule has taken the name from he; it corresponds to 1 watt-according to. With to the physicist William Thomson (then Lord Kelvin), Joule discovered that the temperature of a gas comes down when it expands itself, without activity some (Joule-Thomson effect). Joule received numerous acknowledgments from university and scientific societies of all the world. Its Scientific Papers (2 voll.) they were publishes between 1885 and 1887 to you.
