Sunglasses are eyewear designed to help protect the eyes from excessive sunlight. Eyes are extremely light sensitive and can be easily damaged by overexposure to radiation in the visible and nonvisible spectra. Bright sunlight can be merely a distracting annoyance‚ but extended exposure can cause soreness‚ headaches‚ or even permanent damage to the lens‚ retina‚ and cornea. Short term effects of sun overexposure include a temporary reduction in vision‚ known as snow blindness or welders’ flash. Long-term
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melt with a candle and Bunsen burner. The substances were identified according to their properties. Paraffin wax was identified as a non-polar covalent solid‚ sucrose is a polar covalent‚ sodium chloride was acknowledged as an ionic solid‚ tin is a metallic solid‚ sand is a network covalent‚ unknown#1 is a non-polar covalent solid‚ unknown#2 is an ionic solid‚ and unknown#3 is a polar covalent solid. These conclusions were made based on their physical and chemical properties. Introduction Solid
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First‚ prepare a data table. Record what you see throughout the laboratory activity. Your teacher will demonstrate for the class the reaction of metallic copper with concentrated nitric acid‚ HNO3. This must be done in the fume hood. (Caution: Avoid breathing poisonous gases. Avoid contact of skin with nitric acid. It burns skin and clothing.) One student will be asked to feel the side of the demonstration beaker and report to the group. The products formed are copper(II) nitrate solution‚ Cu(NO3)2(aq)
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IWMST 2013 INTERNATIONAL WORKSHOP ON MATERIALS SCIENCE AND TECHNOLOGY 2013 SUMMARIZATION REGARDING IWMST 2013 International Workshop on Materials Science and Technology was a seminar which has been designed for students of Materials Technology to gain more knowledge and as a path for them to explore more regarding materials science. This seminar has been providing an early exposure and ideas to students related to their career prospects after graduation later. Materials Technology
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HVDC TRANSMISSION H-HIGH V-VOLTAGE D-DIRECT C-CURRENT 1 WHY HVDC ? BULK POWER TRANSMISSION WITHLOWER LINE LOSSES AS NO REACTIVE POWER TRANSFER TAKES PLACE CONNECT TWO ASYNCHRONOUS SYSTEM. PROVIDES SYSTEM STABILITY. CONTROLABILITY OF POWER FLOW AT HIGH SPEED. LESS RIGHT OF WAY FOR TRANSMISSION LINES. NO CONTRIBUTION TO SHORT CIRCUIT LEVEL OF THE AC BUS CONNECTED. NO CHARGING CURRENT TO DIMINISH THE USEFUL CAPACITY OF THE LINE. DISTANCE IS NOT LIMITED BY STABILITY POINT OF VIEW. 2 BREAKEVEN
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This way‚ the periodic table is ordered and chemists can use it to observe patterns‚ and also relationships between the elements. The periodic table at the far left are the most metallic ones‚ and elements on the top right are the least metallic. A metallic element is for example cesium‚ and helium is much less metallic. They are also more patterns and relationships between the arrangements of the periodic table. 24701517907000Below an image of the periodic table: 47142401291854Mendeleev Mendeleev
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matrix composites and inter metallic compounds gained attention. Development in technology and innovation lead to the idea of multicomponent system. These systems consists of multiple principal elements. This was attained by alloying elements with equimolar or near-equimolar ratios. The concept of using multiple principal elements was initially discouraged for it was believed ‚ by conventional metallurgical knowledge‚ there will be several complex phases and inter-metallic compounds which result in
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basic categories : metallic minerals and non-metallic minerals; fossil fuels and non-fuel minerals. Globe consumption of mineral raw products ‚ non-metallic minerals‚ particularly sand together with other materials ‚ the largest share . These minerals are broadly distributed ‚ very low rates ‚ typically community manufacturing ‚ the nearest consumption ‚ the proportion of investment from the worldwide market place is extremely reduced‚ only about 5% of complete manufacturing . Metallic minerals and selected
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Microbiological Media Table of results: Media | E. coli | Salmonella | Serratia | Pseudomonas | Proteus | EMB(Colour: Wine) | Metallic Green sheen on streak.Media: Pink | ColourlessMedia: Wine | Black dot in centre of colonies.Media: Wine | Similar colour to the media.Media: Wine | ColourlessMedia: Wine | XLD(Colour: Red) | ColourlessMedia: Yellow | Black dot in centre of colonies. Media: Pink | Pink/OrangeMedia: Pink | ColourlessMedia: Pink | Black dot in centre of colonies. (smaller
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observed the effects. Data Tables and Observations: Data Table 1: Solubility or Reaction Mg Color: Silver‚ metallic Odor: None Effect of Heat: Color changed white Cold H2O: No effect‚ settled at bottom Hot H2O: No effect Litmus Red: Turned purple Litmus Blue: Turned purple Dilute HCL: Started smoking and fizzing Dilute NaOH: No effect Cu Color: Gold‚ copper‚ metallic Odor: None Effect of Heat: None Cold H20: No effect‚ settled at bottom Hot H20: N effect Litmus Red:
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