a thing is made or composed; component or constituent matter. [1] Materials commonly used in today’s industry or in society are commonly encountered materials‚ for example‚ wood (timber)‚ concrete‚ brick‚ steel‚ plastic‚ glass‚ rubber‚ aluminums‚ copper‚ paper and ceramics. Generally‚ materials are classified into three types of groups; mainly metals‚ polymers and last but not least ceramics. Each and every type of the aforementioned group has their very own specialties‚ properties‚ structures
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Copper is a transitional metal with an atomic number of 29. Its atomic mass is 63.546. A pure metal found in nature‚ its compounds are usually found as copper(II) salts. Copper is typically a reddish-brown with a shine or glow to it. When it is exposed to air it darkens to a brown color. If exposed to air and water‚ it becomes a blue-green. Its phase of matter is solid‚ with a melting and boiling point of 1084.62 °C and 2562 °C respectively. Copper is soft and malleable‚ meaning that it is capable
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Evil Under The Sun The movie “Evil Under The Sun” has been based on the book by Agatha Christie. The film has been directed by Guy Hamilton. It runs for approximately 116 minutes‚ it is rate PG and is filmed in 1981. The movie starts with Hercule Poirot (Peter Ustinov) being called in for two investigations. It’s a case for an insurance company regarding a dead woman’s body found on a hill and an important diamond sent to the company to be insured which turns out to be a fake. Poirot discovers
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Introduction The resistance of a wire depends on certain factors. Some of these variables are listed below: Length of wire Diameter or thickness of wire Temperature at which wire is kept The material of which wire is made out of. The potential difference or voltage. Humidity Cross sectional area. Voltage across circuit All these factors will have to be kept constant except the diameter of the wire whilst doing the experiment to ensure that the investigation is
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mass of copper formed when excess aluminum is reacted with a given mass of a copper salt (Copper Chloride dihydrate)‚ and the mole-to-mole ratio between the reactant and the product of a chemical reaction. Apparatus * 150ml beaker * Stirring rod * Ruler * Hotplate * Tweezers * 50ml graduated cylinder Materials * Copper (II) chloride dehydrate * Aluminum foil Procedure 1) Determine the mass of a clean 150ml beaker. 2) Add 2g of copper (II) chloride
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9/19/06 Lab Report The Empirical Formula of a Copper Oxide Purpose: To convert an unknown copper oxide to copper (Cu) metal using natural gas to provide a reducing environment as shown below: Cu O (s) + CH (g) ¨ Cu (s) + Co (g) + H O (g) From the mass difference between the unknown copper oxide and the Cu metal generated at the completion of the reaction and the molar mass of Cu and oxygen‚ the empirical formula of the original copper oxide can be calculated. Materials: gCopper
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the most amount of copper after it is subjected to a sequence of reactions. The copper is originally in solid form‚ but the reactions will turn it into free Cu+2 ions floating in solution. The ions will then be regrouped to form solid copper once again. During this process‚ however‚ some of the Cu+2 ions may be lost. The copper will subjected to changes in pH and heat. These steps were responsible for the breakdown and reconstruction of the copper. The percent of copper retrieved will reflect
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electrical energy. In the potato battery‚ there is a transfer of electrons between the zinc coating the galvanized nail that will be inserted into the potato and the copper wire that will be inserted another part of the potato. The potato conducts electricity‚ yet keeps the zinc ions and copper ions separate‚ so that the electrons in the copper wire are forced to move (generate current). It’s not enough power to shock you‚ but the potato can run a small digital clock. Materials for a Potato Clock You
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Within Hosseini’s ‘A Thousand Splendid Suns’ and Atwood’s ‘The Year of the Flood’‚ each modern novel’s societies present their central women characters as being enslaved. Whilst each society is entirely different as ‘The Year of the Flood’ is post-apocalyptic and on the other hand ‘A Thousand Splendid Suns’ follows the ever changing political situation in Afghanistan‚ they both suggest that women are enslaved. The term ‘enslaved’ is defined as ‘a state of subjugation’ in which the oppressor has control
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CHEMICAL REACTIONS OF COPPER AND PERCENT YIELD Objective To gain familiarity with basic laboratory procedures‚ some chemistry of a typical transition element‚ and the concept of percent yield. Apparatus and Chemicals |0.5 g piece of no. 16 or no. 18 copper wire |evaporating dish | |250 mL beaker (2) |weighing paper | |concentrated HNO3 (4 – 6 mL)
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