small appliances. In this instance the electric motor has an electric current‚ giving it also this magnetic field. An electric motor converts electricity into mechanical motion. Most electric motors work by electromagnetism‚ but motors based on electrostatic forces also exist. The overarching concept is that a force is generated when a current-carrying element is subjected to a magnetic field. In a cylindrical motor‚ the rotor rotates because a torque is developed when this force is applied at a given
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Control experiments - an experiment in which the variable factors are controlled so as to make it possible to observe the results of varying one factor at a time. Qualitative descriptive research (case studies) – Ultimate goal is to improve practice. This presupposes a cause/effect relationship between behavior and outcome; however‚ this method will ONLY let you hypothesize about variables and describe them. When you move to show correlation among them‚ you’re doing quantitative work. But remember
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KWEKWE POLYTECHNIC BACHELOR OF TECHNOLOGY DEPARTMENT BACHELOR OF TECHNOLOGY (HONOURS) IN ELECTRICAL ENGINEERING In Affiliation with NATIONAL U7NIVERSITY OF SCIENCE AND TECHNOLOGY (NUST) Course: Electromagnetic Fields 1 Paper Code: EPE 4102 Date: Time: REQUIREMENTS: 1. Answer book 2. Calculator INSTRUCTIONS
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Input devices Input device- is any hardware device that sends data to the computer‚ without any input devices‚ a computer would only be a display device and not allow users to interact with it‚ much like a TV. Mouse‚ keyboard and Joystick is an example of an input device. Below is a list of all the different computer input devices that can be used on a computer. Mouse- is a hardware input device that was invented by Douglas Engelbart in 1963 while working at Xerox PARC‚ who at the time was working
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Each of us lives on big earth family‚ the earth provides us wealthy resources and energy .Nowadays，with rapid development of human science and technology‚ people crazy grab the earth’s resources‚ especially after the second industrial revolution accelerated the lighting industry and undoubtedly exacerbate the greenhouse effect and exhausted the earth energy. people crazy mining coal to generate electricity‚ harmful gas and dust and coal combustion has aggravated the earth’s atmospheric pollution
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Dalton’s theory provided a logical explanation of concepts‚ and led the way into new fields of experimentation. J. J. Thomson In 1904 Thomson suggested a model of the atom as a sphere of positive matter in which electrons are positioned by electrostatic forces. This discovery dramatically changed the modern view of the atom. Thomson’s work suggested that the atom was not an "indivisible" particle as John Dalton had suggested but‚ a jigsaw puzzle made of smaller pieces. After the discovery of
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Revision Checklist for O-Level Physics 5054 Guide for Students www.XtremePapers.net REVISION CHECKLIST for O Level Physics 5054 A guide for students How to use this guide The guide describes what you need to know about your O level Physics examination. It will help you to plan your revision programme for the written examinations and will explain what the examiners are looking for in the answers you write. It can also be used to help you to revise by using the tick boxes in Section 3‚ ‘What
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Cell Biology (PCB 3023) Fall 2012 Review for Exam 1 Chapter 1 List the key commonalties and differences between prokaryotic and eukaryotic cells. Prokaryotic – no organelles; no nucleus; bacteria and Achaea; spherical‚ rodlike/corkscrew-shaped; cell wall; Eukaryotic – has nucleus; has organelles Commonalities – contain DNA that stores genetic information What is the main component of cellular membranes? What function(s) do membranes serve in cells? Made of phospholipids; defines
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Edexel IGCSE Chemistry Revision Notes IGCSE Chemistry Triple Award Revision Guide Topic Introduction to chemistry Atomic Structure Structure and Bonding – Ionic Bonding Structure and Bonding – Covalent and Metallic Bonding Organic Chemistry - Alkanes Organic Chemistry – Alkenes / Addition Polymerisation Organic Chemistry – Alcohols / Condensation Polymerisation Calculations Periodic Table Reactivity Series and Metal Extraction Electrolysis Energetics Acids‚ Bases‚ Salts and Neutralisation
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ARTICLE IN PRESS Minerals Engineering xxx (2005) xxx–xxx This article is also available online at: www.elsevier.com/locate/mineng Silver recovery from synthetic photographic and medical X-ray process effluents using activated carbon K.G. Adani‚ R.W. Barley *‚ R.D. Pascoe Camborne School of Mines‚ School of Geography‚ Archaeology and Earth Resources‚ University of Exeter‚ Tremough Campus‚ Treliever Road‚ Penryn‚ Cornwall TR10 9EZ‚ United Kingdom Received 29 April 2005; accepted 24 May 2005
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