045 2.60 2.40 - 2.50 Annealed Steel (As) – Specimen 2 Width (mm) Thickness (mm) I II III Average I II III Average Before 10.24 10.13 10.10 10.16 3.07 3.08 3.09 3.08 After 8.11 8.08 - 8.095 2.32 2.34 - 2.33 Polyethylene (PE) – Specimen 3 Width (mm) Thickness (mm) I II III Average I II III Average Before 10.12 10.11 10.15 10.127 3.29 3.31 3.27 3.29 After* * = no measurement required Log Sheet 1. Plot the stress-strain
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According to Rob Garner‚ two possible ways of protection include using hydrogen and polyethylene to shield astronauts from the harmful effects of radiation. Hydrogen is a great form of radiation shielding because it absorbs the particles well. Hydrogen is normally found as a single electron and proton‚ causing it to be a great radiation shield
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EXECUTIVE SUMMARY Formosa Plastic Group (FPG) was founded in 1954 and headquartered in Taipei‚ Taiwan with over 47‚000 employees. FPG was the largest private diversified chemical company that produced and sold a broad range of products which mostly related to plastic. It also operated 6000 bed hospital‚ medical college‚ a nursing school‚ and a technical college. FPG was organized into three major corporations and other affiliated companies. Those three major corporations are Formosa
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c) Write the name and condensed structure of the monomer units of this polymer. d) Name two properties of this polymer. e) Name two uses for this type of polymer. 4. a) What is addition polymerisation? b) Polyethylene is an example of an addition polymer. Describe what happens to the ethene molecule during this process. c) The mechanism of addition polymerisation consists of three steps. Name each step and give a brief description
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Plastic Composition and Types of Plastic A plastic is made up principally of a binder together with plasticizers‚ fillers‚ pigments‚ and other additives. The binder gives a plastic its main characteristics and usually its name. Thus‚ polyvinyl chloride is both the name of a binder and the name of a plastic into which it is made. Binders may be natural materials‚ e.g.‚ cellulose derivatives‚ casein‚ or milk protein‚ but are more commonly synthetic resins. In either case‚ the binder materials consist
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pavement. Plastic waste‚ consisting of carry bags‚ cups etc can be used as a coating over aggregate and this coated stone can be used for road construction. Different ratios of plastic such as Polypropylene (PP)‚ Low Density Polyethylene (LDPE)‚ and High Density Polyethylene (HDPE) by weight of asphalt were blended with 80/100 paving grade asphalt. Unmodified and modified asphalt binders were subjected to rheological test. The performance tests including‚ Marshall Stability‚ loss of stability tests
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petroleum-derived plastics => high tensile strength‚ insoluble in water‚ non-toxic and biodegradable ADVANTAGES/DISADVANTES: * Biopol is a biodegradable material‚ so it has a smaller impact on the environment than other polymers such as polyethylene (i.e. reduces rubbish levels in landfills) * Biocompatible material‚ which can be dissolved by enzymes in the body. This means that any surgical applications don’t have to be removed from the body * Renewable resource * Very expensive
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Biodegradable is a popular word these days. Everyone is concerned about the environment. But it’s also a word that is easily misunderstood. Biodegradable bags come in several forms‚ but there are big differences between them… and it’s very possible that none may be the right choice for your client. Before deciding on biodegradable bags‚ understanding the environmental concerns is essential. Especially in areas where laws exist concerning plastic bags. Simply defined‚ biodegradable means that an
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Seed Germination‚ Dormancy‚ and Storage 1 _________________ I. INTRODUCTION Seeds role in the germination process is a critical part in the plant ’s survival. This is practically true in almost all of the plants species (Copeland & McDonald‚ 1995). As germination is defined as "the emergence and development from the seed embryo of those essential structure"‚ which‚ for the kind of seed in question indicates "its ability to produce a normal plant under favorable
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with 8 antenna units can be more than 10 times larger than that of resonant dipole antenna. To get this result‚ the pump beam is focused into a linear beam by a cylindrical lens to trigger the antenna array‚ and the linear THz wave is focused by a polyethylene lens before it reaches ZnTe crystal. Keywords: Terahertz antenna‚ antenna array‚ interdigital electrodes‚ resonant dipole antenna‚ GaAs 1. INTRODUCTION Terahertz spectroscopy is of great scientific and technological interest in many fields
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