The article “The Multiple Truths about Crystal Meth among Young People Entrenched in an Urban Drug Scene: A Longitudinal Ethnographic Investigation” by Dayna Fast‚ Thomas Kerr‚ Evan Wood‚ and Will Small highlight the escalation of drug use among youth. The study goes to recognize the rapid growth of meth abuse among youth in affiliation to the social context of individuals. Like any drug there are risks of social and health-related infliction associated with meth use‚ and are often considered by
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language that is studied by the highest percentage of European students‚ 60‚3%‚ with French at only 30‚4%‚ German at 5‚2 % and Spanish at 3.5%. A question that many people are asking is: why has English become the global language of today? David Crystal‚ a famous linguist‚ said: "It [English] is a language which has repeatedly found itself in the right place at the right time". This means that the reason for this dominance can probably be found in the history og the English-speaking countries‚ and
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it can be classified by its color. Another method is the streak test which is the color of the mineral in its powered form this is the true color of a mineral specimen as it lessens the impurity impact and eliminates the light distortion from the crystal. The luster test refers to the absorption‚ refection‚ or refraction of light by the surface of a mineral. The fluorescence test in ultraviolet light‚ some mineral specimens appear to Florence due to the fluorescent mineral impurities or due to locality
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(8 2); 14L (5 4 2 3); 24 L (5 3)3; 26L (17 4 2 3) and 28L (9 5 5 0). Acta Cryst. 22‚ 347 - 352 (1967). DO NOT PLAGIARISE THIS MODEL ANSWER Paragraph 1 ZnS exists in two polymorphs‚ namely sphalerite and wurzite. Analysis of its symmetry and crystal structure using ATOMS will be used to deduce its possible polytypic stacking sequences as well as the orientation relationship between these two structures. Sphalerite is a face centered cubic structure with each sulphur bonded with four zinc atoms
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solid and vice versa. Fusion is the change of state from a solid to a liquid at the same temperature. The opposite of fusion is freezing—a liquid changes into a solid. After a while‚ some of the particles move so fast that they break free of the crystal lattice (which keeps a solid solid)‚ and the lattice eventually breaks apart. Therefore‚ I like physical changes more than chemical changes because of how liquids can become solid and vice versa. I like physical changes more than chemical changes
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If you own glass vases you will want to make sure that they stay clean and Glass Vases 3sparkly. Over a period of time even a crystal glass vase can get dirty and pretty soon it will get foggy and less transparent. Instead of being able to appreciate the beauty within you’ll only be seeing dirt stuck to the glass surface. To prevent this‚ here are three different ways you can keep your glass vase clean. A Little Salt and Vinegar Vinegar is a very potent acid so you’ll need a little salt to dilute
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solubility at different temperature. In this experiment‚ acetanilide was produced by acetylation of aniline with acetic anhydride. The crude acetanilide was dissolved in a solvent in a heated water bath. The solution was cooled slowly in an ice bath as crystals form out. As the compound crystallizes from the solution‚ the limiting reagent Aniline and the percent yield of 96% was obtained. Introduction: This experiment involves four functional groups common in organic chemistry. The substrate (reactants)
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a BCC crystal lattice structure at room temperature. The open-packed planes of atoms make the structure rigid‚ and hard. When external forces are applied the atoms don’t easily move over each other. When iron is heated to around 800 º C its crystal lattice structure changes to FCC. The closely packed atoms move more readily over each other when external forces are applied. FACED CENTERED CUBIC When the molten iron solidifies‚ latent heat is given off and crystals or grains
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The Solid State General characteristics of solid state: Definite mass‚ volume and shape Short intermolecular distances Strong intermolecular forces Fixed lattice positions of the constituent particles Incompressibility and rigidity Classification of the solid state: Crystalline Amorphous (sometimes called pseudo solids or super-cooled liquids) Differences between the crystalline and amorphous solids Crystalline Have definite characteristic geometrical shape Melt at a sharp and characteristic temperature
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a combination of imaging and spectroscopy[2]. The modality of the imaging system will be a hyper cube with 2D spatial information and spectral information[14]. The materials in the scene are identified using spectral information. The location in the scene is identified using spatial information. In addition to image information‚ the classification and identification information is provided in Hyperspectral imaging systems[4]. It is useful for various industrial and other applications‚ which are
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