Electrical_safety 20 23/2/07 10:09 Page 1 Important: New colours for mains electricity cables From April 2006‚ the colours of the live and neutral wires in electrical installation cables have changed from red and black to brown and blue to match the wires in flexible leads to portable appliances. All new wiring must now be in the new colours. Old colours New colours Communities and Local Government Publications PO Box 236 Wetherby West Yorkshire LS23 7NB Tel: 0870 1226
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Modeling Molecules Introduction: You can represent a molecule two-dimensionally‚ as a structural formula or electron dot structure. Although such models are useful in certain contexts‚ they do not accurately represent bond angles between atoms or shapes of molecules. In this activity‚ you will construct three-dimensional models of several molecules. You will use electron dot structures and structural formulas to inform how you construct the three-dimensional models. Materials: jelly beans‚ gum
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Procedure. 1) Accurately weigh approximately 2 g of the mix and dissolve it in 50 mL of diethyl ether. Be sure to dissolve the entire mix since it is not homogeneous. 2) Pour the solution into a separatory funnel. 3) To extract the nicotinamide from the mixture‚ add 5 mL of 5% HCl and shake gently. Draw off the lower aqueous layer into 125 mL Erlenmeyer flask and repeat the extraction with a second portion of HCl. Combine the three extracts and then set this mixture aside. 4) To separate the
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I chose the form of a smart board that I may use in class. In this day and age‚ a classroom without a smart board is seen as incomplete. These touch sensitive devices - usually connected to a computer system and projector - engage students in fun and rewarding activities that make learning more enjoyable and productive than in the past. In addition‚ Math and foreign languages activities are also common‚ and pairs of students can even go head-to-head in a gripping encounter using such games. This
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Uses of Computers in different Fields Our daily encounters with and dependence upon technology is almost invisible as it takes the shape of electronic climate control system‚ wireless communication systems such as phones and pagers‚ automatic tellers to dispense money. Magnetically striped cards to facilitate consumer transactions‚ cable and satellite television‚ auto mobiles and mass transit. Free trade agreements have led to globalization of commerce and scientific debate about global
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Introduction to computer Basics Background This topic will discuss the introduction to the use of the computer in the business area‚ including the basic hardware and software concepts. Information technology (IT) is one of the key resources in the modern business environment. We have lived during the past 20 years in a period that has strongly emphasised the strategic importance of information technology. Consequently‚ those currently involved in management have a clear vision of the technology’s
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WHO/MSD/MSB 00.2g Workbook 6 Client Satisfaction Evaluations Workbook 6 · Clent Satisfaction Evaluations 1 WHO/MSD/MSB 00.2g c World Health Organization‚ 2000 WHO World Health Organization UNDCP United Nations International Drug Control Programme EMCDDA European Monitoring Center on Drugs and Drug Addiction This document is not a formal publication of the World Health Organization (WHO) and all rights are reserved by the Organization. The document may‚ however
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Computers And Marketing Marketing is the process by which goods are sold and purchased. The aim of marketing is to acquire‚ retain‚ and satisfy customers. Modern marketing has evolved into a complex and diverse field. This field includes a wide variety of special functions such as advertising‚ mail-order business‚ public relations‚ retailing and merchandising‚ sales‚ market research‚ and pricing of goods. Businesses‚ and particularly the marketing aspect of businesses‚ rely a great
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Computer Packages 11 Graphic Packages: It is important to recall that the early graphics software performed creditably on production of simple bar graphs and funny little people made of squares. However‚ the modern day graphics software and hardware is so advanced such that it is sometimes difficult to tell if computer or trick photograph produced a picture. Computer graphics as often seen in advertisement‚ Logos‚ and sports broadcast on televisions are products of computer graphic applications
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CHAPTER ONE COMPUTER SYSTEM FUNDAMENTALS 1.1 Computer System as a Universal Tool A computer system is an electronic device that accepts inputs; transform the input through some processes to obtain output or information that can aid effective decision making. Information originated from raw data which by its own simple definition is any raw fact or figure that can be subjected to a form of manipulation before it can be trusted for decision making. Data can originate from various sources depending
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