Who was otzi the Iceman- Page 1 The discovery Who was otzi the Iceman- Page 1 The discovery It was that he was in his mid 40’s and his powerful leg muscles and his general fitness proposed that he may have spent his time rounding up sheep and goats up and down the Tyrolean’s Alps. Otzi had a number of tattoos that were covered all over his body. A cross was on the inner part of his left knee and had six parallel straight lines that were arranged in two rows on his back above the kidney‚ these
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Topic: Silver is an ancient mineral that dates back since prehistoric times. One thing that makes silver so special is that it was one of the first five metals that we started to use. Silver is found in almost every electronic device there is‚ and as time progresses the usage of it increases‚ unfortunately the amount there is left decreases. How is it created or source of the mineral? (5) Silver is not originated from Earth‚ as it happens it came from space. Many elements were formed in the big
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the earth‚ taking out new treasures and burning them. Thus was produced‚ some 6000 years ago‚ a new mineral‚ and from that a new material to which‚ much later‚ we have given the name copper metal. And that day began the Copper Age. In fact‚ this was the beginning of both mining and metallurgy. Not satisfied with copper any longer than a few hundred years‚ he began experiments with other metallic ores like tin‚ zinc and lead‚ and with a stroke of metallurgical
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collecting copper coins and silver coins. One day he observed a green coating on copper coins and a black coating on silver coins. State the chemical phenomenon responsible for these coatings and also write chemical names of each coating. How is our brain double-protected against injuries and shocks? Identify the type of chemical reactions in the following processes: a) Barium chloride solution is mixed with copper sulphate solution and a write precipitate is formed. b) On heating copper powder in
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(800) 433-5255 http://www.thearc.org/page.aspx?pid=2454 * * Lead Poisoning FAQs * Was the property you live in build before 1980 * Does your home have paint that is chipping or flaking ? * Is your house plumbing build with copper or lead pipes? * Have you tested you tap water for lead poisoning ? Lead Poisoning Statistics *
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sticky sweet odor that was once used as an surgical anesthetic. If the density of chloroform is 1.49g/cm3‚ what is the volume of 25g of chloroform? 6. The density of copper is 8.96g/cm3. If a rectangular sheet of copper is 10.3cm wide‚ 46.1cm long‚ and 0.14cm thick‚ what is the mass of the copper? 7. Mercury is a liquid at room temperature with a density of 13.6g/cm3. Would a bar of aluminum float or sink in a pool of liquid mercury? Explain your answer.
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through trade‚ passed to another in a short period; or‚ because of isolation‚ the same product or proMETALS IN ANTIQUITY cess could have taken centuries to be transAll civilizations were born of agriculferred or reinvented by ture. Although the use of copper‚ silver‚ another culture. and gold overlapped the Stone Age era‚ Bronze provides an their early practical application was negexcellent example of ligible. Still‚ even in very early history‚ how a new technology is metals had a significant societal
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covering of another metal surface with another metal)‚ and the manufacturing of many kinds of chemicals such as chlorine‚ sodium chloride‚ and bleach. Also‚ electrolysis is used to extract reactive metals such as aluminium and the purification of copper. With these examples‚ we can say that electrolysis has many benefits‚ for example the manufacturing of bleach. Bleach can be used to clean household equipments‚ and to whiten/lighten or clean stains on white cloth. Other than that‚ there
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Many ore species around the world‚ such as iron ore‚ copper ore‚ gold ore‚ etc.‚ these minerals are drawn out‚ only can play their value. In the process of refining‚ you need to use mineral processing equipment in copper ore processing plant and processing production line process. ore beneficiation plant of crushing equipment‚ grinding equipment‚ flotation‚ magnetic separation equipment‚ etc.‚ beneficiation process also have magnetic separation‚ gravity separation‚ flotation and so on‚ different
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Donner Company. Yan Anantakusumo Yudistiawan Septima Nurlailia Rizki Setyo P Company History Donner Company‚ started in 1985‚ manufactures printed circuit boards‚ technically called as “soldermask overbare copper” boards It faces a competition from around 750 manufacturers in United States. The firm has developed new processes and application and holds patents for these. Process Order Whenever an order was received‚ price was quoted based on estimations of labor
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