Which one of the following is metal? a. C b. N c. Na d. O Ans . 2. (c) 3. Which one of the following is non metal? a. Zn b. Al c. Fe d. N Ans . 3. (d) 4. All materials shown property of malleability expect a. Iron b. Graphite c. Aluminium d. Silver Ans . 4. (b) 5. Which one of the following is a good conductor of electricity? a. Iron b. Plastic c. Wood d. Glass Ans . 5. (a) 6. The property of metal by which it can be drawn into wires is called a. Conductivity b. malleability
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goods‚ which‚ specifies that the title to the goods will remain vested in the seller‚ until certain conditions have been satisfied by the buyer‚ regardless of whether the goods have been delivered to the buyer 4. This can be seen in the case of Aluminium industrie Vaasen BV v
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manual‚ mechanised and automatic (orbital) operation. In manual welding‚ the operator points the tungsten electrode in the direction of welding and uses the arc to melt the base material along the joint‚ Double operator AC TIG welding of an aluminium vessel. ahead of the molten weld pool. The filler metal is generally added at the leading edge of the advancing weld pool. Welding current Both Direct Current (DC) and Alternating Current (AC) may be used when TIG welding‚ the choice
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bug zapper because it was easy to set up the crocodile clips with it. Afterwards I tried the same experiment with a television set‚ using tinfoil which gave static electricity when it was switched on and off. Investigative question: Will the aluminium cans react in the same way that the original Franklin bell reacted? In other words‚ can I use a source of electrostatic energy to make the tab on my pencil
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electrical technology is aluminium. It is used quite a lot as it cheap‚ lightweight and in abundance compared with other electrical conductors. Aluminium is used in overhead power cables as it is has many properties which make it ideal for this purpose. It is very easy to work Aluminium can be easily fabricated into various forms such as foil‚ sheets‚ shapes‚ rods‚ tubes‚ and wires. It also displays excellent malleability and plasticity in bending‚ cutting‚ and drawing. Aluminium does not rust as when
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of elements being oxidized by the oxygen in air or in water. Hydrocarbon combustion affords the two principal carbon oxides:carbon monoxide and carbon dioxide. Even materials considered pure elements often develop an oxide coating. For example‚ aluminium foil develops a thin skin of Al2O3 (called a passivation layer) that protects the foil from further corrosion.[2]Different oxides of the same element are distinguished by Roman numerals denoting their oxidation number‚ e.g. iron(II) oxide versus iron(III)
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Geotextiles and Geomembranes 27 (2009) 167–175 Contents lists available at ScienceDirect Geotextiles and Geomembranes journal homepage: www.elsevier.com/locate/geotexmem Improvement of soft soils using geogrid encased stone columns Joel Gniel 1‚ Abdelmalek Bouazza* Monash University‚ Department of Civil Engineering‚ Building 60‚ Melbourne‚ Victoria 3800‚ Australia a r t i c l e i n f o a b s t r a c t Article history: Received 16 May 2008 Received in revised form 4 November
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the long‚ spiral track. A thin‚ reflective aluminium layer is then coated on the top of the disc‚ covering the bumps. The tricky part of CD technology is reading all the tiny bumps correctly‚ in the right order and at the right speed. To do all of this‚ the CD player has to be exceptionally precise when it focuses the laser on the track of bumps. When you play a CD‚ the laser beam passes through the CD’s polycarbonate layer‚ reflects off the aluminium layer and hits an optoelectronic device that
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early atmosphere - earth roughly 4 billion yrs old - created by volcanoes erupting + releasing gases - contained mostly co2 + water vapour - earth cooled + water vapour condensed to form oceans - co2 dissolved into oceans + used to form marine organism shells which were compacted to form sedimentary rock - plants evolved to photosynthesise‚ takingin co2 + releasing oxygen - scientists don’t kno where all nitrogen came from bc they weren’t there to record evidence but most theories suggest
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of the crystalline powder on an aluminium pan. The aluminium pan was heated at 165 °C on a hot plate. The melt was then cooled down to room temperature by placing the pan on a cold metal surface. (To prepare a solid dispersion‚ equal quantities of the γ form of indomethacin and a polymer were weighed. The amounts were mixed in a mortar and pestle to obtain a homogeneous mixture of indomethacin and polymer at a 1:1 ratio (w/w). This mixture was spread on an aluminium pan‚ heated at 165 °C and cooled
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