http___www.tportal.hr_portalplus_teen_29736_sto-je-karat.html_1.xml
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A carat is a unit of weight for diamonds and other gemstones. One carat equals 200 milligrams (0.200 grams). There are 453 grams in a pound (1,000 grams to a kilogram). Therefore, if your fiancee weighs 170 pounds, you have a 385,050-carat fiancee! A karat, when used with gold, is a unit of purity-- 24-karat gold is pure gold, but usually you mix gold with a metal like copper or silver to make jewelry (because pure gold is too soft). Each karat indicates 1/24th of the whole. So if a piece of jewelry is made of metal that is 18 parts gold and 6 parts copper, that is 18-karat gold. Where did such a funny unit of purity come from? It turns out that a German gold coin called a mark was common about a thousand years ago. It weighed 24 carats (4.8 grams). The purity of the gold in the coin was expressed in the number of carats of gold present in this 24-carat coin. Here are some interesting links:
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Karat je jedinica za čistoću zlata Broj karata daje broj dijelova čistog zlata u slitini podijeljenoj u 24 dijela. Na primjer, osamnaestkaratno zlato sadrži 18 dijelova zlata i šest dijelova neke druge kovine. Čistoća zlata danas se izražava promilima i naziva se finoćom zlata. U ovoj rubrici svaki tjedan možeš pročitati neku zanimljivost ili otkačenu činjenicu kojom možeš iznenaditi svoje vršnjake, ali i one puno starije! - Sviđa vam se članak? Preporučite ga prijateljima putem ovih servisa: Pošaljite mailom