a wide range of alloys containing 50-90% Cu by weight. Copper is sometimes used to describe things that are reddish-brown in colour. Copper occurs combined in many minerals, such as chalcocite, chalcopyrite, bornite, cuprite, malachite, and azurite. Her characteristic green color is called a patina, the result of exposure to air in her first 25 years. Copper was harvested in a very pure form by 4000 BC in the Lake Superior area in the United States. Used in coins, marine applications, and musical instrument strings. Copper is a part of many coinage metals. Having the reddish-brown colour/color of copper. Copper's antibacterial properties were used in ancient Egypt to sterilize water and prevent infections. Copper plays the same role of oxygen transport in the hemocyanin of blue-blooded mollusks and crustaceans as iron does in the hemoglobin of red-blooded animals. And as alloyed in bronze (copper-tin alloy) about 3000 BC, was the first engineering material known to man. Definition of 'copper'. Every metal traded on the LME must conform to strict specifications regarding quality, lot size and shape. The periodic table is made up of 118 elements. How to use copper in a sentence. Copper also forms an important series of alloys with aluminum, called aluminum bronzes. The copper cake is preferable in engineering and construction because of its high scrap value and excellent performance in terms of heat transfer. Copper, an essential mineral, is naturally present in some foods and is available as a dietary supplement. The Roman supply of copper came almost entirely from Cyprus. Copper.net is compatible with all mainstream operating systems. The body excretes excess copper in bile, a digestive fluid produced by the liver. Second only to silver, copper is not only an excellent conductor of electricity but also of heat. Articles from Britannica Encyclopedias for elementary and high school students. Although we cannot provide technical support for Linux, our dialup and email services are still a great option for that operating system. Around 5000 BC, bronze, an alloy of copper and tin, brought a new era of easy manufacturing with copper. Copper is commercially produced mainly by smelting. To be classified as #1, the copper should be comprised of bus bars, clippings, commutator segments and wire of at least 1/16th of an inch in diameter. 74-95% Cu by weight. Copper alloys have reasonable strength and improved corrosion resistance. copper (comparative more copper, superlative most copper) Made of copper. What is copper in Minecraft? Copper is usually found in nature in association with sulfur. Copper is commercially produced mainly by smelting or leaching, usually followed by electrodeposition from sulfate solutions. Copper is not known to interact with any medications. The Statue of Liberty is clad in over 62,000 pounds of copper! Yes, we have a brand new resource to play with, which you can smelt, wield, and craft until your heart desires. This native copper was first used (c. 8000 bce) as a substitute for stone by Neolithic (New Stone Age) humans. Exposure for long periods to air, however, results in the formation of a thin green protective coating (patina) that is a mixture of hydroxocarbonate, hydroxosulfate, and small amounts of other compounds. Natives used the metal for weapons and tools, and from the 1840s until 1969, Copper Harbor was one of the most productive copper mining sites in the world. ...a copper mine. Inspirationen und Tipps zu Beauty, Reisen und Themen, die das Leben schöner machen. We recommend and offer technical support on Windows 95, 98, ME, 2000/NT, XP, Vista, Win7 and Apple Mac OS 8 or greater. To get more copper in you, your doctor may suggest you take copper tablets or a multivitamin that has copper in it. 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