Investigatory Project In Science & Technology IV (Potato Battery) Submitted by : Eloisa Umali Chelsea Jayne D. Diaz Pia Angela Valencia Acknowledgement The researchers would like to acknowledge with sincerest gratitude the following persons for the support they gave to them in the accomplishment of this investigatory project. Mrs. Rosie Castillo‚ who guide us and helped us in making this project. Who gave us the opportunity
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Materials The materials required for this experiment: 9 wooden barbeque sticks (disposable skewers) 150 mm long each Approximately 500 mm of copper wire Red and black insulated wire (0.5 mm) ‚ 5 meters long each 1 tube of super adhesive glue 1 roll of scotch tape 1 roll of insulation tape Aluminum foil 50mm x 500 mm 1 DC high voltage power supply ?up to 50kV at 5005A Ruler Paper knife 1 resistor 10kohm‚ 2W Procedure 1. For this experiment‚ the independent variable is the DC voltage
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periodic table‚ between groups 2 and 3. They are generally hard and dense‚ and less reactive than the alkali metals. Iron‚ copper‚ silver and gold are important transition metals. The transition metals: overview The elements in the centre of the periodic table‚ between groups 2 and 3‚ are called the transition metals. Most of the commonly used metals are there‚ including iron‚ copper‚ silver and gold The transition metals Common properties The transition metals have the following properties in common:
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Wiring Techniques Course No: E03-007 Credit: 3 PDH A. Bhatia Continuing Education and Development‚ Inc. 9 Greyridge Farm Court Stony Point‚ NY 10980 P: (877) 322-5800 F: (877) 322-4774 info@cedengineering.com CHAPTER 2 WIRING TECHNIQUES LEARNING OBJECTIVES Upon completing this chapter‚ you should be able to: 1. State the basic requirements for any splice and terminal connection‚ including the preferred wirestripping method. 2. State the reason the ends of the wire are clamped down after a Western
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Episode 112: Resistivity In this episode‚ students learn how and why the resistance of a wire depends on the wire’s dimensions. They learn the definition of resistivity and use it in calculations. Summary Discussion: Variation of resistance with length and area. (5 minutes) Student experiment: Variation of resistance with length and area. (30 minutes) Discussion: Variation of resistance with length and area. (10 minutes) Student experiment: Measurement of resistivity. (30 minutes) Student
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too brittle to use for structural materials. 2. A) Describe the uses of brass‚ steel and solder and 2 other alloys of your choice‚ and explain how these uses relate to their properties. Brass: The two major metals in brass are copper and zinc. The proportion of the copper to zinc affects the colour of the alloy‚ ranging from a rose coloured alloy to a yellow alloy. The higher the proportion of zinc‚ the greater the hardness and tensile strength of the alloy. Brass can be highly polished and is lustrous
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when the solute atoms take up positions of solvent atoms in the crystal lattice. If the two metal atoms are about the same size and have the same crystallographic structure‚ then the two metals may form a solid solution. Brass‚ an alloy composed of copper and zinc‚ is an example of a substitutional alloy. Alloys have different applications depending on their properties. The various types of steel and iron are all alloys classifiable by their content of other materials. For instance‚ wrought iron has
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Flows in the Copper Industry (Technical Memo). Argonne. IL: Argonne National Laboratory‚ 1980 (Prepared for the United States Department of Energy). R.U. Ayres : Resources‚ Conser6ation and Recycling 21 (1997) 145–173 173 [22] Forrest D‚ Szekely J Austria: International Institute for Applied Systems Analysis‚ 1991. (S0144093-4). Columbus OH: Battelle-Columbus Laboratories‚ June 27‚ 1975 (Prepared for U.S. [25] Davis WE. National Inventory of Sources and Emissions: Barium‚ Boron‚ Copper‚ Selenium and
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Description of the experiment * Aim: To observe the reactions of sulfuric acid as an oxidising agent and as a dehydrating agent. Equipment: * 20mL of concentrated sulfuric acid * 20mL of 2mol/L sulfuric acid * 2 small pieces of each of copper‚ zinc and iron * Sandpaper * 10 test tubes * Test tube rack * 2g of sugar crystals (sucrose) * 2 wooden ice-cream sticks * 10mL measuring cylinders Steps: A: Sulfuric acid as an oxidising agent 1. Clean pieces of metal
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The World Copper Factbook 2013 About ICSG The current members of ICSG are: Australia The International Copper Study Group (ICSG) was formally established as an autonomous inter-governmental organization on 23 January 1992‚ following a series of Ad Hoc meetings sponsored by the United Nations (UNCTAD) in 1986 and 1987 to review the world situation of copper and discuss the need for such a body. ICSG serves to increase copper market transparency and promote international discussions
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