sir james dewar

الإنجليزية - الإنجليزية

تعريف sir james dewar في الإنجليزية الإنجليزية القاموس.

born Sept. 20, 1842, Kincardine-on-Forth, Scot. died March 27, 1923, London, Eng. British chemist and physicist. In 1891 he built a machine for producing liquid oxygen in quantity. His Dewar flask for storing liquefied gases a double-walled flask has insulating vacuum between the inner and outer walls became essential in low-temperature scientific work; its principle is used in the Thermos bottle. Dewar was the first to liquefy and solidify hydrogen, and his 1905 discovery that cooled charcoal can help create high vacuums was useful in atomic physics

الواصلة

sir James Dew·ar

التركية النطق

sır ceymz duır

النطق

/ˈsər ˈʤāmz ˈdo͞oər/ /ˈsɜr ˈʤeɪmz ˈduːɜr/