Measurement of hardness is a useful non-destructive testing method used to determine the applicability of the crystal in the device fabrication. Microhardness study was carried out on 2PPA single crystal using a Vickers microhardness tester fitted with a Vickers diamond pyramidal indenter in order to evaluate its mechanical stability. The static indentations were made at room temperature and 323 K with a constant indentation time of 5 s for all indentations. As grown polished sample of 2PPA was used
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English as a global language – 2nd edition – David Crystal Chapter 1 summary In why a Global Language‚ author David Crystal explains what a global language is‚ how English has become the global language of today‚ and also why it is important for the world to have a global language. The article begins with David Crystal going explaining how English is the global language today. He explains how English is everywhere‚ it can be found all around the world‚ even headlines in other countries
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of the most famous “archaeologists” in the world. However‚ can a fictional movie character played by Harrison Ford really be considered an archaeologist? As we look into the most recent film in the franchise‚ Indiana Jones and the Kingdom of the Crystal Skull‚ we find many indicators that Indiana Jones could actually be considered a real archaeologist. With that‚ we also see many characteristics that do not make him an archaeologist‚ and show that he might not have ever had any archaeological training
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In this experiment I conducted a test to see if solid crystals would form better between sugar and unionized salts. Also under two different temperatures‚ would this effect the size at all. My overall hypothesis was to test at what rate and size would crystals grow in sugar vs salt at different temperatures‚ and that I thought the salt would produce a greater amount of crystal deposits. My method was hanging a string from a pencil immersed in the different solutions. My results were similar in both
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Throughout the centuries‚ people have often wished they could somehow know what would happen in the future before it actually happened. Sometimes‚ however‚ certain consequences are hinted at ahead of time‚ giving you a chance to take care of it before it is too late. In his book 1984‚ George Orwell uses foreshadowing through Winston ’s dreams and memories to predict what will happen in later events‚ which then explain what took place before. (S) One memory that was foreshadowed was the last time
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it Affects Salt Crystal Size 12/07/11 Research Question: How does the saturation of water affect the size of the salt crystals? This project was chosen because it was intriguing and to find out if more salt equals bigger crystals. Hypothesis: If the water is more saturated then the salt crystals will be bigger. The Independent Variable is the amount of salt in the water. The Dependent Variable is the size of the salt crystals. The Controlled
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and growth of sugar crystals due to the rapid movement of the molecules. If the solution is allowed to cool before it is beaten‚ only tiny crystals forms‚ which are not allowed to grow. This results in a creamy mass. So when making candy‚ like fudge‚ you should allow cooling the sugar syrup to 38°C before beating it‚ otherwise you will end up with crystals that are too large‚ resulting in a grainy texture. The beating must also continue until the formation of the tiny crystals is complete‚ otherwise
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that we are able to consume a variety of textured candy such as rock candy‚ fudge and glass candy. Despite only using boiled water and sugar‚ the type of candy formed is dependent on the presence of sugar crystal formation and its size. At a molecular level‚ sucrose molecules form a small crystal that is orderly arranged in three dimensions.These molecules are attracted and held together by intermolecular forces. However‚ when water is added to the granulated sugar‚ the sucrose molecules begin to
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rich in lead‚ zinc‚ and silver‚ which are owned by Mexico’s largest lead producer‚ Industrias Penoles. Within the Naica mines are caves filled with giant selenite crystals‚ discovered by miner brothers‚ Juan and Pedro Sanchez in 2000. The caves were discovered while drilling through the Naica fault during a mining expedition. The giant crystal caves are in the shape of a horseshoe and have been carved out of cretaceous limestone rocks. The caves‚ which are located 1‚000 feet underground‚ have an average
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DISCUSSION 3.1. Powder X-Ray diffraction analysis The grown Cd doped LSMH crystal were subjected to powder X-ray diffraction studies using a Rich Seifert X-ray diffractometer employing CuKα (1.54058 Å) radiation‚ scanning angle ranging from 10° to 70° at a scan rate 1°/min to confirm the crystalline phase of the grown crystal. Fig 2 shows the X-ray powder diffraction patterns of pure as well as Cd doped LSMH single crystals. The obtained (h k l) values are indexed using the JCPDS software. It belongs
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