UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level CHEMISTRY Paper 1 Multiple Choice May/June 2005 1 hour Additional Materials: Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB is recommended) 5070/01 w w w e tr .X m eP e ap .c rs om READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples‚ paper clips‚ highlighters‚ glue or correction fluid. Write your name‚ Centre number and candidate number on the answer
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it was based around death‚ which is why he also used the theme of vanity to create the work. Fiona Hall’s artwork ‘Lotus’ from the collection of works Paradisus Terrestris is based around the idea of human vs. nature. The artwork is created from aluminium and a sardine tin that has been pulled back to reveal the stomach of a human body. The series also refers to the paradise of Australia and Sri Lanka‚ especially this artwork that features the lotus flower‚ also known as the temple flower. ‘There
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to prevent climate change”. During last several decades‚ industrialization and human activities have produced greenhouse gases (mainly carbon dioxide). These gases make the earth’s temperature higher that leads to more serious events‚ such as ice smelting‚ floods‚ storms and droughts. This is called “climate change”. Climate change would have significant impacts on environment‚ economy and the way we live so it needs to be prevented. In my opinion‚ there are several things that everybody as individual
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of high chromium alloyed casting ball must be more than 58 HRC and impact value 3.0 J/cm2‚ according to national standard and requirement. Forging steel ball manufacturers made steel ball through direct heating and forging way. It doesn’t need smelting process. Compared with casting steel ball‚ chromium content is much lower‚ between 0.1% 0.5%. Carbon content is below 1.0%. surface hardness of forging steel ball canreach more than 56. Hardening layer is around 15 mm due to poor harden ability
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Your phone is fueling a war in the Congos. A conflict dubbed the Africa’s world war has been raging since 1996 in the wake of the Rwandan genocide. After the genocide more than two million Hutus fled to The Congo afraid of prosecution from the new Tusis government. In 1996 Uganda and Rwanda invaded the Congo on claims of rooting out out Hutsu war criminal‚ and a war then began. The war was settled but not ended there are still rebel forces all over the Congoo that the government can’t deal with
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the spaces provided. 1 Aluminium has many uses. 1 (a) An aluminium atom has 13 electrons. 1 (a) (i) Draw the electronic structure of an aluminium atom. Nucleus (1 mark) 1 (a) (ii) Name the two sub-atomic particles in the nucleus of an aluminium atom. .................................................................. and .................................................................. (1 mark) 1 (a) (iii) Why is there no overall electrical charge on an aluminium atom?
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wheel consists of hard abrasive grains called grits‚ which perform the cutting or material removal‚ held in the weak bonding matrix. A grinding wheel commonly identified by the type of the abrasive material used. The conventional wheels include aluminium oxide and silicon carbide wheels while diamond and cBN (cubic boron nitride) wheels fall in the category of superabrasive wheel. 28.1 Specification of grinding wheel A grinding wheel requires two types of specification (a) Geometrical specification
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services that offer a similar benefit to an industry’s products or services‚ but by a different process. Customers will switch to alternatives (and thus the threat increases) if: The price/performance ratio of the substitute is superior (e.g. aluminium maybe more expensive than steel but it is more cost efficient for some car parts) The substitute benefits from an innovation that improves customer satisfaction (e.g. high speed trains can be quicker than airlines from city centre to city centre)
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* Aluminium foil * Cyclohexane * Cyclohexene * Bromide water * Measuring cylinder Risk assessment risk | level | Precautions taken | Organic compound in eyeor on skin | medium | Glasses‚ lab coatgloves | Inhaling organic compound | high | Fume cabinet | Bromide water in eye or onskin | medium | Glasses‚ lab coatgloves | Laceration from broken glass | low | Minimalizing movement of glassware | Method 1. Wrap two of the flasks in aluminium foil
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drinks‚ such as soft drinks beers‚ aluminium is often used. Tin plate is a solid‚ heavy steel covered with tin to protect it against rust. It is used to package canned foods. It can be separated by magnets should be recycled in all cases. Aluminium is attractive‚ light strong at the same time‚ but requires a lot of raw materials energy to make it. For this reason it must be recycled. The majority of cans of soft drinks‚ lids‚ aluminium foil‚ etc. are made aluminium. Brick carton A light‚ strong
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