diameters and lengths of the two metal cylinders and the copper wire (ii) Determination of mass of same (iii) Computation of densities of the cylinders and comparison with the acceptable values. Materials used Equiptment 1. Triple- beam balance 2. Vernier Caliper 3. Micrometer 4. Electronic balance (to measure mass of copper wire) 5. A ruler (inches and centimeters) 6. Graduated Cylinder 7. A roll of copper wire. 8. Wire Cutter 9. Irregular object (lead‚
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Chemistry: Research task 1 5.1- define the terms mineral and ore with reference to economic and non-economic deposits of natural resources The term ‘ore minerals’ is commonly referred to as economic minerals Mineral: naturally occurring compounds. Rocks are mixtures of various minerals. Most minerals are lattice structures‚ both ionic and covalent. Economic minerals have been divided into two main categories: Metalliferous minerals- mined to extract a metal Industrial mineral- either has
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they do begin to deplete. For example‚ copper‚ in the early 1960’s telephone use in the United States was expanding enormously‚ at the time the only way to carry the data over telephones was over copper wire‚ so as telephone use began to expand to new parts of the United States‚ the demand for copper began to rise‚ as the demand of copper began to rise so did the price. The outcome of this scenario is that people begin to worry we would not have enough copper to wire the entire country for telephone
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Bibliography: Ablett‚ E. (2013). The Extraction of Copper. Retrieved from Metal Assignment: http://metalsassignment.wikispaces.com/The+Extraction+of+Copper Azulay‚ T BBC. (2013). Different substances and their properties. Retrieved from BBC: http://www.bbc.co.uk/schools/gcsebitesize/science/add_aqa_pre_2011/atomic/differentsubrev5.shtml Brooks‚ W Clark‚ J. (2005). Copper. Retrieved from Chem Guide: http://www.chemguide.co.uk/inorganic/extraction/copper.html Creamer
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1) TO STUDY THE VARIATION OF RESISTANCE WITH THE NATURE OF MATERIAL For this Nichrome and copper wires of same length (1m) and area of cross section(0.5mm) are taken. One of them (say nichrome) is connected in the circuit and the rheostat is adjusted to get a voltage(V) in the circuit. The corresponding ammeter reading(I) is noted and the ratio V/I=R is calculated. The procedure is repeated for different values of voltage
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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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Compound Katie Sanders Science Block 3 February 29‚ 2012 Title: Analysis of a Hydrated Crystalline Compound Purpose: The purpose of our experiment was to determine the amount of water in copper sulfate pentahydrate expressed as a percent. Hypothesis: I think that bluestone crystals are 20% water‚ because it’s called pentahydrate (penta means five) and 1/5 of 100 (since it’s expressed as a percent) is 20‚ so I think bluestone crystals
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coins — soak in distilled water (the minerals in tap water can further taint the coin’s surface if soaking for a long time) or olive oil — olive oil is a very gentle way to clean coins‚ but you may need to soak them for several weeks. Silver‚ copper‚ and nickel-clad coins can be soaked in distilled water or‚ to remove tough stains‚ white vinegar. A 6-minute soak in lemon juice may also be used on silver coins. This will not only protect the coin but it will help give the coin a finish at the
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chemical change? Answer: The potassium nitrate and the ammounuiam hydroxide had a chemical change. It started bubbling and getting really foggy. The calcium nitrate and ammonuiam hydroxide did nothing. It’s all clear still‚ but no chemical change. The copper nitrate and ammonuiam hydroxide turned a bluish color so that had a chemical change. (5 points) Score 2. For each metal that participated in a chemical change‚ write the type of metal it is‚ based on your examination of the periodic table. Answer:
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conductivity and resistance to combustion. Silver is not only a good conductor of heat and an essential catalyst for many industries‚ it also is commonly used as jewelry. The lack of durability in pure silver forces a mixture to be made with 5-20% copper to form an alloy known as sterling silver. The uses of Silver have dramatically changed as more inventions and ideas have come along. Silver’s small availability and high price due to high numbers of coins‚ brought the U.S to pass the Johnson Silver
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