long time ago. Why? (ii) Which of the metals in the above table is the most suitable to make pipes for hot water? Explain your answer. (iii) (1) Aluminium does not corrode easily. Why? (2) Aluminium is a principal material for making aircraft but its strength is relatively low. Suggest how the strength of aluminium can be improved to make it suitable for making aircraft.# (iv) (1) Based on the information given in the table‚ suggest ONE factor that affects the price
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CHEMISTRY REVISION GUIDE for IGCSE Coordinated Science This revision guide is designed to help you study for the chemistry part of the IGCSE Coordinated Science course. The guide contains everything that the syllabus says you need you need to know‚ and nothing extra. The material that is only covered in the supplementary part of the course (which can be ignored by core candidates) is highlighted in dashed boxes: Some very useful websites to help you further your understanding include: •http://www
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direction of movement of electrons Confusion in use of symbols- Is ampere written as A or amp. V=W/Q is often remembered wrongly. In questions where you have to check the resistance from the graph see what is plotted along the x and y axis. Reason why alloys are used to make elements of electric irons and heaters is not because they are insulators. 2. Units 3. 4. Formula Graphs 5. Resistivity 6. Change in resistance If a wire is folded(doubled on it) and made half its length
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References: Aluminum formwork. (n.d.). Aluminum formwork. Retrieved December 8‚ 2013‚ from http://www.ylformwork.com/news/5.html aluminium formwork - Tac System Formwork Sdn Bhd - construction industry - concrete structures - form work. (n.d.). aluminium formwork - Tac System Formwork Sdn Bhd - construction industry - concrete structures - form work. Retrieved December 8‚ 2013‚ from http://www.tacsystemformwork.com/vs.htm Cavallari‚ D.‚ &
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C2.1.1 Structure and bonding a) Compounds are substances in which atoms of two or more elements are chemically combined. b) Chemical bonding involves either transferring or sharing electrons in the highest occupied energy levels (shells) of atoms in order to achieve the electronic structure of a noble gas. c) When atoms form chemical bonds by transferring electrons‚ they form ions. Atoms that lose electrons become positively charged ions. Atoms that gain electrons become negatively charged
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SCORE SCIENCE 10 ONE MARK MODEL QUESTION PAPER CHAPTERWISE Compiled By‚ A. JEBASINGH‚ M. Sc.‚ M.Ed.‚ M.Phil. BT Asst. (Science) Edited By‚ A. SAVARIMUTHU‚ B.Sc.‚ M.A.(Eng).‚ B.Ed. BT Asst. (Science) Typed By‚ J. LOGESH OUR SINCERE THANKS TO Rev. Bro. Dr. M.IRUDHAYAM M.Sc.(Phy).‚ M.Sc.(E&E)‚ M.Sc.(Psy).‚ M.A.(Eng).‚ M.Phil.‚ M.A.(Soc).‚ M.Phil.‚ PGDCA‚ PGDHET‚ PGDEA‚ MBA‚ M.Ed.‚ PhD. HEADMASTER & CORRESPONDENT ST. JOSEPH’S HR. SEC. SCHOOL CHENGALPATTU- 603002 CONTACT
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employed. The higher weld-metal deposition rate of FCAW over GMAW (Gas Metal Arc Welding) has led to its popularity in joining relatively heavy sections of 1" or thicker. Another major advantage of FCAW is the ease with which specific weld-metal alloy chemistries can be
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Chemistry All about matter There are three different stages of matter: Solid‚ Liquid and Gas Solid (s): Have a certain volume and shape. “Particles” are arranged in a specific crystalline patter and they only vibrate around fixed positions. Liquid (l): Have a fixed volume‚ but not shape. The particles have some freedom and can move around each other. They collide often. Gas (g): Doesn’t have a fix volume or shape. (Takes up the space where it is) Particles move freely in all space available
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ferrous metals for the present purpose are: (i) Cast iron (ii) wrought iron (iii) steel. Some of the important non-ferrous metals used in engineering design are: (a) Light metal group such as aluminum and its alloys‚ magnesium and Manganese alloys. (b) Copper based alloys such as brass (Cu-Zn)‚ bronze (Cu-Sn). (c) White metal group such as nickel‚ silver‚ white bearing metals e.g. Selection criteria for engineering materials The selection of material‚ for engineering purposes‚ is one
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|13 | |(C) Alloys | | |Arrangement of atoms in metals |14 | |What are alloys? |15 | |Composition‚properties and uses of alloys
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