Shielded Metal Arc Welding (SMAW) is the most widely used welding process in the small scale industries‚ because of its low cost‚ flexibility‚ portability and versatility. Shielded metal arc welding is one type of welding process which uses consumable electrode consist of filler core rod coated with chemicals that will help during welding by providing flux and shielding. This process give pure and clean weldment that has high material deposition rate compared to traditional welding process. The SMAW
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“Effect of Heavy Metal- Lead Nitrate; on Germination‚ Early Growth & SDH activity of Mustard & Mung Bean” By: Reuben David Department of Biotechnology Loyola Academy Degree & P.G. College Accredited with the ‘A’ Grade by the NAAC A College with Potential for Excellence by UGC Affiliated with Osmania University Old Alwal‚ Secunderabad-10 2009 “Effect of Heavy Metal- Lead Nitrate; on Germination‚ Early Growth & SDH activity of Mustard & Mung Bean” By: Reuben David (06-1821)
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1779 Microcontroller-Based High-Power-Factor Electronic Ballast to Supply Metal Halide Lamps Marco Antonio Dalla Costa‚ Member‚ IEEE‚ José Marcos Alonso Álvarez‚ Senior Member‚ IEEE‚ Jorge García‚ Member‚ IEEE‚ André Luís Kirsten‚ Associate Member‚ IEEE‚ and David Gacio Vaquero‚ Student Member‚ IEEE Abstract—The analysis‚ design‚ and implementation of a microcontroller-based electronic ballast to supply metal halide (MH) lamps are presented. The proposed topology is based on the integration
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Metal identifiers are electronic hardware (compact) that can be utilized to locate a concealed fortune trove of gold‚ coins‚ ancient rarities‚ collectibles and other profitable metal things that are covered and lay covered up in the ground or water. Metal discovery has gotten to be a standout amongst the most prevalent distractions everywhere throughout the world with a large number of individuals enjoying it with family and companions. Regardless of whether you are a tenderfoot or experienced
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Schools have Metal Detectors? Have you ever felt violated‚ disrespected and dishonored to the point of no return? Many students around the world feel such a way every day. According to a 2002 National School Board Association report‚ 10.1 percent of school districts nationwide implement the use of metal detectors. Are metal detectors even effective? Why should students be forced to cooperate with a violation of their rights? High Schools around the world should not employ the use of metal detectors
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A metal is defined as an opaque shiny element which possesses properties such as malleability and ductility. Malleable meaning that they can be hammered into shapes and ductile meaning they can be drawn into wires. They are also very strong and posses high tensile strength and are good conductors of heat and electricity. Metals are shiny‚ and also have high densities. Metals are a very important and significant part of chemistry. However‚ their importance is not just limited to chemistry; they are
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Alkali Metals Introduction Alkali metals refer to six elements belonging to the Group IA of the long form of the Modern Periodic Table‚ viz. Lithium (Li)‚ Sodium (Na)‚ Potassium (K)‚ Rubidium (Rb)‚ Cesium (Cs) and Francium (Fr). Fr is a radioactive element. These elements are called so because they form strongly alkaline oxides and hydroxides. Electronic Configuration of Alkali Metals Each of the alkali metals has one electron in their outermost (valence) shell‚ which is just outside an inert
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Making an Activity Series of Metals using different Solutions Purpose/ Hypothesis: The purpose of this lab was to clearly identify the reactivity of magnesium‚ zinc and copper. The metals reactivity will be exemplified as it will be tested with different solutions such as zinc sulfate (ZnSO4)‚ copper sulfate (CuSO4)‚ hydrochloric acid (HCL)‚ magnesium sulfate (Mg2SO4)‚ iron (II) sulfate (FeSO4) and tin (II) chloride (SnCl2). This will allow us in creating an activity series to visually see the reactivity
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Metals and alloys. Hume-Rothery rules. 1. Three types of metals. 2. Alloys. Hume-Rothery rules. 3. Electrical resistance of metallic alloys. 4. Applications of metallic alloys. 5. Steels. Super alloys. 6. Electromigration in thin wires. Three types of metals Metals share common features that define them as a separate class of materials: • Good thermal and electrical conductors (Why?). • Electrical resistance increases with temperature (Why?). • Specific heat grows linearly with temperature
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مدرستنا الثانوية اإلنجليزية‚الشارقة OUR OWN ENGLISH HIGH SCHOOL‚ SHARJAH A GEMS SCHOOL CHEMISTRY WORKSHEET TOPIC: METALS AND NON-METALS GRADE:8 Note: Revise the symbols and valency of metals and non-metals. Q1.What would you observe when you put a) Some zinc pieces into blue copper sulphate solution? b) Some copper pieces into green ferrous sulphate solution? c) An iron nail into blue copper sulphate solution? Q2.Complete and balance the following equations: a) Zn + O2 b) Pb + O2 c) Cu
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