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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the way things work in a battery by using everyday items we see around the house. The goal is to learn more about electricity‚ and possibly a few new science terms along the way. III Materials: * Two Potatoes * Two short pieces of heavy copper wire * Two common galvanized nails * Three alligator clip/wire units (alligator clips connected to each other with wire) * One simple low-voltage bulb with bulb socket IV Procedure: 1. Remove the battery from the battery compartment
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Amplifier DC Voltmeter in a Digital Multimeter Copper Coins and Zinc-Galvanized Nails Procedure: 1. Set the multimeter to the “2V” (direct current) range. Turn it on. 2. To measure its voltage‚ insert the black and red probe to the potato. To increase the voltage‚ inject a coin and a zinc-galvanized nail to the said fruit‚ and connect it to the multimeter using the alligator clips‚ have the black probe to the zinc-galvanized nail while the red probe to the copper coin. 3. Read the value. b. Lighting
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There are‚ and always have been many theories on how and why Oetzi the Iceman was killed. Many theories say he was murdered by an enemy‚ tracked down and hunted after surviving a battle with an enemy clan‚ or even that he was sacrificed to the god of the mountains. There is no way to surely determine how he died to a tee‚ and ever since the Iceman’s discovery‚ new evidence has been consistently presenting itself‚ suggesting new and improved theories‚ while also dismissing the old. After extensive
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Physics assignment Aim To determine which factors affect the resistance of a conductor‚ and the mathematical relationship that exists between these variables. Hypothesis Copper wires would be a better conductor than nichrome wires because it would yield less resistance when they have same cross-sectional area‚ length and temperature. Resistance would be increased when length wires increased. Resistance would be increased when cross-sectional area of wires decreased. Resistivity of wires is a factor
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TOPIC 2 Metals The History of Metals * Uses of metals through history: * Copper Age (3200-2300 BCE) – copper and tin were most common metals‚ and were used for ornaments‚ weapons and tools. * Bronze Age (2300-700 BCE) – copper‚ tin and bronze were used for tools‚ weapons and transport. They produced bronze by heating copper and tin with charcoal. * Iron Age (1000 BCE – 1 CE) – iron steel and lead was used for tools‚ weapons and pipes. Iron is much harder than bronze.
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MATERIALS : METALS AND NON-METALS Y Iron Coal ou are familiar with a number of materials like iron‚ aluminium‚ copper‚ etc. Some materials have been given in Table 4.1. Table 4.1 : Appearance and Hardness of materials Object /Material Appearance Hardness (Shiny/Dull) (Very hard/ Not very hard) similar change if we try to beat a wood log ? Let us find out. Activity 4.1 Take a small iron nail‚ a coal piece‚ a piece of thick aluminium wire and a pencil lead. Beat the iron nail with
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References: Copper - Wikipedia‚ the free encyclopedia. (n.d.). Wikipedia‚ the free encyclopedia. Retrieved February 17‚ 2012‚ from http://en.wikipedia.org/wiki/Copper Finlay‚ W. L. (1968). Silver-bearing copper; a compendium of the origin‚ characteristics‚ uses‚ and future of copper containing 12 to 25 ounces per ton of silver‚. New York: Corinthian Editions. Nile‚ 3. B. (n.d.). History of Metals
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powder is adedd to the water‚ and the amount of Zinc‚ and the water in the cup. Dependent- Change of Water temperature. Materials -Measuring Celinder-Copper Sulphate Solution ( 1M CuSO4) -Polystyrene Cup- Zinc Powder -Balance-Thermometer -Watch or a Clock with second hand- Safety Spectacles Procedure First‚ we measured 25 ml of Copper Sulphate Solution into a Polysterene Cup. Then‚ we weighed 6g of Zinc Powder on a piece of paper. We put the thermometer into the polysterene cup
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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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