FAMOUS PEOPLE OF SCIENCE AND TECHNOLOGY

James Prescott Joule, famous British physicist, was born in 1818 in Salford, England.

Joule was one of the most outstanding physicists of his time. He is best known for his research in electricity and thermodynamics. In the course of his investigations of the heat emitted in an electrical circuit, he formulated the law, now known as Joule's law of electric heating. This law states that the amount of heat produced each second in a conductor by electric current is proportional to the resistance of the conductor and to the square of the current. Joule experimentally verified the law of conservation of energy in his study of the conversion of mechanical energy into heat energy.

Joule determined the numerical relation between heat and mechanical energy, or the mechanical equivalent of heat, using many independent methods. The unit of energy, called thejoule, is named after him. It is equal to 1 watt-second. Together with the physicist William Thomson (Baron Kelvin), Joule found that the temperature of a gas falls when it expands without doing any work. This phenomenon, which became known as the Joule-Thomson effect, lies in the operation of modern refrigeration and air-conditioning systems.

UNIT 7

AUTOMATION AND ROBOTICS

I. Text A: «Automation», Text B: «Types of automation»,

Text C: «Robots In manufacturing»

II. Famous people of science and technology: James Watt.

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<== попередня сторінка	\|	наступна сторінка ==>
Non-consumable Electrode Arc welding	\|	Text A: «AUTOMATION»

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