Our Use of Metals 1. Define the terms mineral and ore Mineral - Any homogeneous‚ inorganic‚ solid substance which is naturally occurring. Ore - Any mineral or combination of a mineral and other substances from which a valuable‚ useable substance can be obtained (usually metals). 2. Describe the extraction processes‚ including chemical equations‚ of copper and aluminium and describe the environmental impact of these extraction processes. Copper There are two main methods used to extract
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Problem Does temperature affect the resistivity of different sized copper wires? Hypothesis I think that the resistivity will increase with higher temperatures because with higher temperature‚ resistivity is higher due to the fact the atomic lattice structure increases. Background Electrical resistivity is the measurement of how a material opposes the flow of an electrical current. On the other hand‚ electrical conductivity () is the inverse of resistivity. It is the measurement
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Identification of a Copper Compound by Percent Mass Unknown Compound: #9 Abstract: The objective of this experiment was to identify the unknown pure copper salt compound of #9. To do this‚ the mass of copper in the unknown was calculated and then divided by the mass of the whole compound to get the percent copper. The molecular weight was also calculated by dividing mass of copper compound used by moles of compound in unknown sample. The percent copper averaged out to 31.6% while the molecular
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easy to lead as they inform us about various ways of leading life. Books are informative as well as instructive. A person is never going to feel alone in the presence of books. In the company of books‚ a person is never going to feel the boredom of daily routine if he has nothing else to do. Books have many wonders in it and they make a person absorbed in their interesting content. The best example of being a friend of book can be seen while long journeys when a person has nothing to do except to sit
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in the market than the copper cables. These cables are widely used in offices or residential areas. Copper cables transmit information through electrical signals. It has been used as a speaker system wire‚ telephone wire‚ computer cable wire etc. for over years now. Optical fiber comprises of plastic or glass strands to transmit data or information digitally with the use of light rather than electricity. On the other hand‚ copper cable encompasses of a single thread of copper. The size of the cable
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workforce diversity can help any country advance‚ because work diversity includes many aspects‚ such as age‚ gender‚ nationality etc. For the age diversity‚ the country’s workers can not only the young person‚ and also can’t only old person‚ because old worker have more work experience‚ they can help young people grow up fast‚ but old worker always have fixed mind-sets‚ so the young people can bring the spirit of innovation‚ they complement each other and learn from each other‚ they can improve together
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five floors or so down from the street into the insane chaos erupting inside the World Trade Center ’s immense ten-acre foundation hole‚ seventy feet deep‚ that was suffering unimaginable violence as it absorbed the force of each tower ’s collapse. (Online) Over the first few hours‚ the volunteers
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Fifteen-year-old Amari loves life in her home village in Africa. She spends her days strolling along the stream‚ daydreaming about her handsome future husband‚ teasing her little brother‚ and avoiding chores. But everything changes the day the pale-faced visitors arrive. Everyone contributes for the celebration to welcome the strangers. Amari helps her mother arrange the food‚ her storyteller father shares his tales‚ her fiancé plays his drum‚ and everyone dances. But then their world shatters
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BIN LAIDN and his fellow’s attack World Trade Centre which in results America attacks on Afghanistan. Many afghan’s migrated to Pakistan and during migration some organizations migrated to Pakistan with afghan’s and live as citizen of Pakistan. After migration these organizations are going to target poor and needy people of Pakistan they usually belong from northern areas who don’t get food even for two days. These people are unfortunately illiterate. The organizations are
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Collapse of I-35W Highway Bridge Minneapolis‚ Minnesota August 1‚ 2007 highway ACCIDENT REPORT National Transportation Safety Board NTSB/HAR-08/03 PB2008-916203 NTSB/HAR-08/03 PB2008-916203 Notation 7975C November 14‚ 2008 Highway Accident Report Collapse of I-35W Highway Bridge Minneapolis‚ Minnesota August 1‚ 2007 National Transportation Safety Board 490 L’Enfant Plaza‚ S.W. Washington‚ D.C. 20594 National Transportation Safety Minneapolis‚ Minnesota‚ August
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