pure+silica
41Surry, Maine — Infobox Settlement official name = Surry, Maine settlement type = Town nickname = motto = imagesize = image caption = image |pushpin pushpin label position =left pushpin map caption =Location within the state of Maine pushpin mapsize = |mapsize …
42Glass harmonica — The glass harmonica, also known as the glass armonica, hydrocrystalophone, or simply armonica (derived from armonia , the Italian word for harmony), is a type of musical instrument that uses a series of glass bowls or goblets graduated in size to …
43History of Cumberland, Maryland — Cumberland, Maryland is named after the son of King George II, Prince William, the Duke of Cumberland. It is built on the site of the old Fort Cumberland, a launch pad for British General Edward Braddock s ill fated attack on the French strong… …
44Superheated water — is liquid water under pressure at temperatures between the usual boiling point (100°C) and the critical temperature (374°C). It is also known as subcritical water and pressurised hot water. Superheated water referred to in this article is stable… …
45LI-900 — is a type of Reusable Surface Insulation Tile developed and manufactured by Lockheed Missiles and Space Company in Sunnyvale, California. It was designed for use on the Space Shuttle as part of its thermal protection system to minimize thermal… …
46Geology of Tasmania — Tasmania has a varied geological history, with the world s biggest exposure of diabase, or dolerite. Rocks from the Neoproterozoic, Paleozoic and Mesozoic time periods appear. It is one of the few southern hemisphere areas glaciated during the… …
47Florida — Floridian /fleuh rid ee euhn/, Floridan, adj., n. /flawr i deuh, flor /, n. a state in the SE United States between the Atlantic and the Gulf of Mexico. 9,739,992. 58,560 sq. mi. (151,670 sq. km). Cap.: Tallahassee. Abbr.: FL (for use with zip… …
48silicon carbide — Chem. a very hard, insoluble, crystalline compound, SiC, used as an abrasive and as an electrical resistor in objects exposed to high temperatures. [1900 05] * * * ▪ chemical compound Introduction exceedingly hard, synthetically produced… …
49Mohs' scale — mōz , mōs , mō səz n 1) a scale of hardness for minerals in which 1 represents the hardness of talc; 2, gypsum; 3, calcite; 4, fluorite; 5, apatite; 6, orthoclase; 7, quartz; 8, topaz; 9, corundum; and 10, diamond 2) a revised and expanded… …
50flint — noun a hard grey rock consisting of nearly pure silica (chert), occurring chiefly as nodules in chalk. ↘a piece of flint shaped to form a primitive tool or weapon. ↘a piece of flint used with steel to produce an igniting spark. Origin OE; related …
