The Identification and Production of Materials 1. Fossil fuels provide both energy and raw materials such as ethylene‚ for the production of other substances. Students Learn To: .2 Identify the industrial source of ethylene from the cracking of some of the fractions from the refining of petroleum. • Ethylene is produced either from natural gas or crude oil‚ which are mixtures of hydrocarbons. One method involves… Cracking: a process by which hydrocarbons with higher molecular
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Gillespie Chemistry Lab 112 Section 02 4/02/2013 Abstract A sample of soil was tested for possible contaminants and other information using a variety of techniques including moisture analysis‚ pH measurement‚ acid-base titration‚ chloride-ion electrode analysis‚ and flame testing. The sample had a greater concentration of chloride ions‚ no measurable CaCo3 ‚ and lower than standard moisture content. It was contaminated with KCl and likely HCl ionic solids. Introduction Soil is a vital component
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WELDING TECHNOLOGY IN OFFSHORE STRUCTURE NURUL HUSNA BINTI MAHAYUDDIN SITI AISYAH BINTI MOHD YUSOF NURFAEZAH BINTI MOHD HASSIM AIDA BINTI ABD WAHIT AQMAL ARIFFIN BIN ALIAS 2011127493 2011180123 2012248558 2011295216 2011255028 Recently‚ oil and natural gas are being more actively developed throughout the world to cope with the increasing demand. A rapidly growing number of offshore structures are being built‚ for example‚ in Southeast Asia‚ Korea and China. Offshore steel structures
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is on the inside of an implant and the magnet‚ which is attached to the hardware with a coil. The magnet is what makes it work basically. The magnet attached to the internal piece of metal. The internal (implanted) parts include a receiver and electrodes. The receiver is just under the skin behind the ear. The receiver takes the coded
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Hong Kong Diploma of Secondary Education Examination Integrated Science School-based Assessment Sample Tasks Teachers may use the sample tasks for non-profit making educational and research purposes with proper acknowledgement. © 2009 Hong Kong Examinations and Assessment Authority All Rights Reserved 2009 TABLE OF CONTENT Task C1 C2 C4 C5 C6 C7 C8 E3 Title Osmosis in Living Tissue Catalytic Activity of Enzyme Action of Electricity on Substances Encountered in Daily Life Do
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workings of a cochlear implant are amazing. As described my Med EL‚ “An internal device is placed under the skin‚ behind the ear. An electrode array is connected to the internal device. The array is a bundle of tiny wires that have electrodes that spread out along the length of the array. The array is inserted into the auditory portion of the inner ear (cochlea). The electrodes send electrical signals from the internal device to different areas of the cochlea to represent different sound frequencies. A
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EECE 352: 352 PN Junctions Peyman Servati y Outline • • • • Diffusion and drift currents Current continuity PN Junctions Diodes‚ photodetectors‚ solar cells Diffusion of Electrons Movement of electrons and holes (charge carriers) results in ( g ) conduction in materials. Electrons and holes in solids move based on Brownian motion (random walk). In this random movement‚ electrons effectively move from a movement location where the concentration is higher to where the concentration is
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SPECIAL ISSUE Development of High Voltage DC-XLPE Cable System Yoshinao MURATA*‚ Masatoshi SAKAMAKI‚ Kazutoshi ABE‚ Yoshiyuki INOUE‚ Shoji MASHIO‚ Seiji KASHIYAMA‚ Osamu MATSUNAGA‚ Tsuyoshi IGI‚ Masaru WATANABE‚ Shinya ASAI and Shoshi KATAKAI We have developed a cross-linked polyethylene (DC-XLPE) insulating material that has excellent properties for DC voltage applications. Our high-voltage (HV) DC XLPE cable and factory joints using this material showed positive results in a polarity
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Determination of Chemical Formulae: The Reaction of Zinc and Iodine By Sarah Abstract: The main objective of this experiment was to use to the reaction between zinc and iodine to examine the validity of the Law of Conservation of Mass and the Law of Constant Composition. The Law of Constant Composition was tested by determining the mass of each of the reactants‚ zinc and iodine‚ and comparing their total to the mass of the zinc iodide product plus the excess zinc. The total mass of the reactants
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Carbon Nanotubes Abstract Carbon nanotubes (CNTs) are a recently discovered allotrope of carbon. They take the form of cylindrical carbon molecules and have novel properties that make them potentially useful in a wide variety of applications in nanotechnology‚ electronics‚ optics‚ and other fields of materials science. They exhibit extraordinary strength and unique electrical properties‚ and are efficient conductors of heat. Inorganic nanotubes have also been synthesized. A nanotube is a member
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