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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This report will describe the expected patterns of development in physical‚ social and emotional‚ cognitive‚ language and communication categories. It will consider development in 0-3‚ 3-7‚ 7-11 and 11-16 age ranges and describe how development can be promoted. In the 0-3 section it will also explain and give examples of factors which can affect their development and how the areas of development can be promoted. 0-3 Years Physical Child development progresses from head to toe. Starting from
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TOEFL Outlines ( 1 – 50 ) TOEFL question #21: Some high schools require all students to wear school uniforms. Other high schools permit students to decide what to wear to school. Which of these two school policies do you think is better? Use specific reasons and examples to support your opinion. I. There are schools which require school uniforms and those which do not. I feel that school uniforms should be required. Uniforms give all students equality‚ identity and pride. II. Uniforms give
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MEMO Date: May 2‚ 201 To: CEO From: Re: Lead levels in whistles An issue was raised the manager of the QA team that I feel we need to address. Whistles that are part of the toy collection scheduled to be shipped to a customer in South America have lead content that is higher than allowed by current U.S. standards. Shipping potentially harmful toys without disclosure could do irreparable damage to the image of the company‚ even if shipped out of the U.S. Before addressing
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The brass alloy we are experimenting on is called Muntz Metal. Muntz metal is 60% copper‚ 40% zinc and a hint of copper [http://en.wikipedia.org/wiki/Muntz_metal] (accessed 4/10/12). Muntz metal was developed as an alternative to expensive‚ heavy copper. It is comprised of about 60% copper and about 40% zinc‚ with a small amount of iron. The finished product actually is considered a form of brass‚ but it has maintained its name of Muntz metal. [http://www.wisegeek.com/what-is-muntz-metal.htm] (Accessed
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I. BACKGROUND Precious metals and gemstones have been a popular investment vehicle especially in Asian countries and on the part of those who are constantly moving from one country to another. Asians have a special fondness for them because precious metals and gemstones have enabled them to survive hard times most especially when the super power waged their wars on our shores. Another reason for this is the presence of many gold deposits and mines in our country
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Extrusion is the process by which a block/billet of metal is reduced in cross section by forcing it to flow through a die orifice under high pressure. • In general‚ extrusion is used to produce cylindrical bars or hollow tubes or for the starting stock for drawn rod‚ cold extrusion or forged products. • Most metals are hot extruded due to large amount of forces required in extrusion. Complex shape can be extruded from the more readily extrudable metals such as aluminium. * The products obtained are also
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[pic] Intro Turn a calculator into a metal detector I recently discovered a really cool method in using a few household items to make a HomeMade Metal Detector! Heres how to make your own! Heres a link to the video : http://www.youtube.com/watch?v=_G5HzeIl9cY [pic] Step 1 What you need. All you need for this project is‚ an: AM Radio ‚ some tape ‚ and a small calculator. [pic] Step 2 Let’s Begin Begin by turning the AM radio on. Tune it to the high end
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Lofton 2 June 2008 Whistle-blowing in the workplace: Do we stand by and allow business corruption as usual or prepare to take a fall for something? It sometimes requires uncommon courage‚ as whistle-blowing in the workplace is not so easy to do. What motivates you? Is it revenge‚ ethics or a combination? To take a closer look‚ let’s consider what is whistle blowing and explore a few conditions used to justify whistle-blowing‚ and concluded with how companies can benefit from a whistle-blowing
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Scrap Metal To Inform To inform my audience that scrap is a commodity often confused with waste. Scrap has monetary value making up one of the largest exports of the United States. Introduction I. Scrap is a $65 billion dollar industry in the United States. The U.S exports $15.7 billion to other countries. II. While this is a global industry it all starts with local entrepreneurs like me. III. Scrap is everything that we throw away that can be recycled and used to make new products.
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