w w w e tr .X m eP e ap UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education .c rs om 0625/11 May/June 2011 45 minutes PHYSICS Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB recommended) *3129497903* READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples‚ paper clips‚ highlighters‚ glue or correction fluid. Write your name‚ Centre number
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The World Copper Factbook 2013 About ICSG The current members of ICSG are: Australia The International Copper Study Group (ICSG) was formally established as an autonomous inter-governmental organization on 23 January 1992‚ following a series of Ad Hoc meetings sponsored by the United Nations (UNCTAD) in 1986 and 1987 to review the world situation of copper and discuss the need for such a body. ICSG serves to increase copper market transparency and promote international discussions
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X rays and Ultrasound are two of the main imaging techniques used in radiography. For the purposes of this essay‚ we will look at conventional x-rays and diagnostic ultrasound. Conventional x rays are non-invasive diagnostic techniques that are used to capture images of the body’s organs and bones. Diagnostic ultrasounds are high frequency sound waves to create an image of soft issues in the body such as muscles‚ joints‚ and internal organs. As examined below‚ while both are used in diagnostic radiography
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hacking”‚ is said to not only help those battling depression‚ epilepsy and other similar conditions but also to improve concentration‚ memory and mental abilities of healthy individuals. The process is quite simple‚ it uses two electrodes‚ cathode and anode‚ which are put on the skin on certain positions on the head. The current used is a very low-voltage direct current. Those behind this method claim that the current enters the brain through the skull and causes neurons to change their firing rate‚ which
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Direct exchange Direct exchange geothermal heat pump The Direct exchange geothermal heat pump is the oldest type of geothermal heat pump technology. It is also the simplest and easiest to understand. The ground-coupling is achieved through a single loop circulating refrigerant in direct thermal contact with the ground (as opposed to a combination of a refrigerant loop and a water loop). The refrigerant leaves the heat pump appliance cabinet‚ circulates through a loop of copper tube buried
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object in front of it. 6. The presence of __________________ cells on the retina helps us to see in dim light. SECTION B 1. Define the following: a) Electrolyte b) Cathode c) Anode d) Jons 2. What is electroplating? 3. Give some examples
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Chemistry: Research task 1 5.1- define the terms mineral and ore with reference to economic and non-economic deposits of natural resources The term ‘ore minerals’ is commonly referred to as economic minerals Mineral: naturally occurring compounds. Rocks are mixtures of various minerals. Most minerals are lattice structures‚ both ionic and covalent. Economic minerals have been divided into two main categories: Metalliferous minerals- mined to extract a metal Industrial mineral- either has
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Compiled SCH4U Course Review Unit 1: Atomic Structure and Bonding Section 3.3 Electron Configurations and Periodic Trends (pg. 139-157) Feb. 11 For single electron system all orbitals with the same value of have the same energy Atoms with more than 1 electron with the same value of n have different energies (sublevels) Because of interactions between additional electrons All orbitals within a sublevel have the same energy The Fourth Quantum Number: A property of the electron (spin quantum
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(380-500°C) to remove the magnesium or calcium. High purity bismuth is produced after treatment using sodium hydroxide. 2.The Betts Process involves electrolytic refining of lead bullion. In a catalytic solution‚ pure metallic lead plates onto the anode‚ while unwanted material‚ including bismuth‚ sinks to the bottom of the vessel. The muddy mix of metals can be melted to produce a metal alloy and a bismuth-rich slag‚ which is then reduced with carbon to produce bismuth metal. . Bismuth is used in
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Laboratory 3: Diode Characteristics Instructions: Unless otherwise mentioned in the experiment instructions‚ all experiments are performed both in SPICE and physical implementation. The results need to be reported from both the SPICE and physical measurements. 1 Current voltage characteristics of diodes 1. Design a circuit to measure the forward-bias current voltage characteristics of diode as shown in Fig 3 using Circuitlab. Figure 1: A SPICE circuit for plotting current voltage
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