Technology‚ Environment and Society Bachelor of Engineering (B.E.) Year/Part: IV/II Program: Computer and Electronics Definitions Technology According to Webster’s dictionary‚ technology is defined as a description of arts. General definition of technology Technology is technical means‚ which involves the systematic application of organized knowledge‚ and tools and materials for the extension of human facilties. Technology is the source of change in society. Technological
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5-9)‚ so it has excellent abrasive resistance. The best crusher configuration for basalt :PE jaw crusher limestone hammer crusher for sale‚ PF impact crusher‚ PYG cone crusher. Kenya is a country which is rich in mineral resources‚ such as copper‚ iron‚ titanium‚ manganese‚ gold‚ and so on. When you want the exploitation of mineral stone‚ there are many choices. But we provide you with the best combination‚ improve efficiency and reduce energy Consumption‚ and we provide mobility to facilitate the
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OXIDATION AND REDUCTION Oxygen makes up only about 20% of the air‚ yet is the essential component for so many reactions. Without it fuels would not burn‚ iron would not rust and we would be unable to obtain energy from our food molecules through respiration. Indeed animal life on the planet did not evolve until a certain concentration of oxygen had built up in the atmosphere over 600 million years ago. The term oxidation has been in use for a long time to describe these and other reactions where
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On January 16‚ 2016‚ President Barack Obama declared the city of Flint‚ Michigan to be in a state of emergency due to the widespread lead poisoning of the city’s residents that later became known as the Flint Water Crisis (Southall 2016). The crisis began in April of 2014‚ when the officials of Flint decided that‚ in an effort to conserve dwindling funds‚ the city would switch their main water source from Lake Huron‚ to the Flint River (Southall 2016). Almost immediately‚ the residents of Flint began
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striations on a metal indicates: a. Differences in loads. b. Load reversals. c. Residual stresses. 10. When pig iron is placed in a Bessemer converter: a. 10 – 20 tonnes for 30 minutes. b. 20 – 30 tonnes for 45 minutes. c. 20 – 50 tonnes for 15 minutes. 11. A ferrous metal has the code 4089; what does this denote about the material? a. Chromium vanadium alloy of 99.89% iron purity. b. Molybdenum alloy of 0.89% carbon content. c. Nickel steel of 0.89% carbon content. 12. At room
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Class 1 Metallic bonding: Found in metals and alloys‚ 1‚ 2‚ or 3 valence electrons that are not bound to any particular atom in the solid. They drift throughout the entire metal. This results in a sea of electrons. These free electrons result in good electrical and heat conductivity. Coordination number is 8 or 12 (number of nearest neighbors). Ionic Bonding Found in compounds that are composed of both metallic and nonmetallic elements. Metallic element gives up valence electrons to the
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evidences of a chemical reaction‚ thus‚ of a chemical change. Materials Crucible tongs Evaporating dish Glass rod Test tubes Test tube rack Thermometer Analytical balance Magnesium ribbon pH paper 1M copper (II) sulfate Iron metal 6M hydrochloric acid Procedure Magnesium and oxygen test A small strip of magnesium metal is held on one end with a pair of crucible tongs‚ while the other end is ignited with the flame of Bunsen burner. The burning ribbon is held
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Steel pipes and GI Pipes. * Cement Pipes: the pipes such as Cement Pipes‚ Asbestos cement (AC) pipes‚ cement concrete pipes. Plastic Pipes: the pipes such as Un-plasticized PVC (UPVC ) pipes‚ Polythene Pipes (low denisity) Cast Iron (CI) Pipes These pipes are mostly used in water supply. They are well suited for pressure and can withstand external load because of their thickness. The pipes are easy in manufacturing‚ layout and joining. These pipes are manufactured by vertical
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three-dimensional textured privacy glass[citation needed] — a smoke cloud does not obstruct an image‚ but thoroughly scrambles it. Contents [hide] 1 Chemical composition 1.1 Visible and invisible particles of combustion 2 Dangers of smoke 2.1 Smoke corrosion 3 Secondhand smoke inhalation 4 Measurement of smoke 5 Medicinal smoke 6 See also 7 References 8 External links Chemical composition[edit] This section needs additional citations for verification. Please help improve this article by adding
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significant savings in both human life‚ cost‚ efficiency and schedule . Contemporary Materials 56. Iron Pickets . The iron pickets currently being used do not have adequate strength to withstand the vagaries of climate and snow fall. The new design which consists of hollow cylindrical poles is being tested. The use of nanotechnology can significantly enhance the properties of steel and reduce corrosion and increase it’s strength. 57. Concertina Coils and Barbed Wire . Nanomaterials like Carbon
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