metal(lic) filament

Игры ⚽ Поможем решить контрольную работу

Fluorescent lamp — A fluorescent lamp or fluorescent tube is a gas discharge lamp that uses electricity to excite mercury vapor. The excited mercury atoms produce short wave ultraviolet light that then causes a phosphor to fluoresce, producing visible light.Unlike… … Wikipedia
Uranium — (pronEng|jʊˈreɪniəm) is a silvery gray metallic chemical element in the actinide series of the periodic table that has the symbol U and atomic number 92. It has 92 protons and 92 electrons, 6 of them valence electrons. It can have between 141 and … Wikipedia
Boron — (pronEng|ˈbɔərɒn) is a chemical element with atomic number 5 and the chemical symbol B. Boron is a trivalent nonmetallic element which occurs abundantly in the evaporite ores borax and ulexite. Boron is never found as a free element on… … Wikipedia
ter-3, terǝ- and teri-, trī- — ter 3, terǝ and teri , trī English meaning: to rub Deutsche Übersetzung: “reiben; drehend reiben” (from which “drehen”), “(reibend) durchbohren” Note: also teru : treu (extended with b, g, gh, ĝh, k, p); here ter 2 “tender” (eig … Proto-Indo-European etymological dictionary

Словари и энциклопедии на Академике