chemical element with the symbol F‚ atomic number 9‚ 9 electrons and protons‚ 10 neutrons‚ and the atomic mass of 19. Being the lightest halogen‚ it has one stable isotope‚ fluorine 19. At standard pressure and temperature‚ the element is a pale yellow gas as a liquid its a bright yellow. The electrons are located outside the nucleus of the atom. Electrons are organized in such a way that the space between them are inter dispersed. Within this space are distinct distances up to 100‚00 times away from
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OIL AND GAS EXPLORATION: INTERROGATING THE OIL COMPANY’S ADHERENCE TO ARTICLE 40 ON COMMUNITY COMPENSATION Indigenous communities across the globe have been victims of unwarranted exploitation by private investors in the search for among others oil and gas. Whenever governments and oil companies intend to enrich themselves from the oil revenue‚ history has indicated that voiceless citizens are subjected to inhuman treatment and torture‚ deprivation of their indigenous community rights‚ disruption
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Bhopal Gas Tragedy Product - Brand name Sevin (Union Carbide) - Third most used insecticide in US - Not fatal to people Carbaryl - Does not cause cancer Chemistry TLV = 0.02 ppm Methyl isocyanate Methyl Isocyanate (MIC) Clear‚ colourless‚ b.p. 39oC‚ odour threshold 2.1 ppm Effects of 0.4 ppm - Coughing - Chest pain - Breathing pain (dyspnea) - Asthma - Eye irritation - Nose‚ throat‚ skin damage Effects of 21 ppm - Lung oedema - Emphysema (damage of lung tissue) - hemorrhaging - bronchial
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are many different types of thermometers; however each one is based on a physical property of a thermometric (temperature measuring) substance that differs in a measurable way with temperature. Some of the physical properties that vary with temperature are volume‚ resistance and color. A physical property that increases or decreases with temperature can be used to measure temperature. This is called a thermometric property. Liquid-In-Glass Thermometers There are two types of liquid-in-glass
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Marketing Research Planned Projects‚ Goals and Objectives Starbucks is now starting there two new major projects which are the “Our Next 40 Years Begins Now” and “Explore Green Store”. The project‚ “Our Next 40 Years Begins Now”‚ started on March 8‚ 2011 marked its 40th anniversary‚ and as part of their celebration they had introduced their new logo. “As you start to see it out in the world‚ I hope you’ll start to appreciate the simplicity and elegance of the new design. I like the new mark
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Different types of thermometers Galileo thermometer. A Galileo thermometer (or Galilean thermometer)‚ named after Italian physicist Galileo Galilei‚ is a thermometer made of a sealed glass cylinder containing a clear liquid and a series of objects whose densities are such that they rise or fall as the temperature changes. By definition‚ Galileo’s thermometer is actually a thermoscope‚ not a thermometer. Gas thermometer A gas thermometer measures temperature by the variation in volume
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‘color’ and ‘to write’ or to represent. Although there are a couple different types of chromatography‚ in each case a substance is placed onto or into a medium and a solvent is passed through the test substance. In chromatography science‚ the solvent is called the mobile phase or the carrier fluid and the medium is called the stationary phase. There are four main types of chromatography; these are Liquid Chromatography‚ Gas Chromatography‚ Thin-Layer Chromatography and Paper Chromatography. Chromatography
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very efficient for transporting a variety of substance around the body. Ventilation: gaseous exchange is also a very important for exchanging materials. Oxygen and carbon dioxide are able to move easily between the lungs and the blood by diffusion. Gas and solute exchange surfaces in humans have been adapted to maximise their effectiveness. The larger an organism gets and the more complicated it is which makes it harder for materials to be exchanged. Gaseous exchange is the process by which oxygen
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Metal Welding - Types and Processes Welding. So you think it’s as simple as grabbing the gun and pulling the trigger‚ eh? Tell me this then - what types of welding are there? Not completely sure? Read on... Arc Welding Arc welding is a process utilizing the concentrated heat of an electric arc to join metal by fusion of the parent metal and the addition of metal to joint usually provided by a consumable electrode. Either direct or alternating current may be used for the arc‚ depending upon
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Gas Exchange in Mammals The mammalian respiratory system consists of the nasal cavity‚ pharynx‚ glottis‚ larynx‚ trachea‚ bronchi‚ bronchioles and air sacs (alveoli). The respiratory passages are lined by the presence of cilia and mucus-secreting cells‚ which keep them moist and trap dust‚ dirt and bacteria. The lungs are encased a rib cage. The rib cage is composed of the breastbone or sternum and ribs. At the bottom of the rib cage is a muscular diaphragm. Breathing in mammals. During inhalation
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