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BAR-CODESBar codes are a series of parallel black and white lines used on food and other products such as books. The black and white lines represent numbers. A bar-code reader ( scanner ) is used to i..

252: Sensors, Control And Data Logging

SENSORS A sensor measures a physical variable such as heat or moisture.The value of the variable is then input into a CPU ( Central Processing Unit ) DATA LOGGING Sensors mon..

253: Matrices

Matrices are sets of numbers which are put inside brackets in a tabular form. A matrix contains information which you can manipulate. To be able to work with matrices you have to know it's order. Thi..

254: Accuracy

Numbers can contain a certain amount of error. Accuracy measures the amount of error or uses the known amount of error to find maximum or minimum possible values. You can work out the percentage err..

255: Standard Form

Standard form is used to represent either very large or very small numbers. Calculators normally have a function to use standard form. However, you must understand how it works on your calculator to ..

256: Percentages

Percentages are used all the time. They are used just like fractions. Just like fractions, they are used to find part of a value which may be an increase or decrease of the original value. A percent..

257: Ratio

Ratios compare two or more quantities which are in the same units. They are written with a colon ( : ) between each values. Ratios can be treated just like fractions and can be simplied. Finding Rat..

258: Decimals

Decimals are the part of the number which come after the decimal point. This part of a number shows a part of a whole or 1. You must be comfortable using them as they are used all the time. Examples:..

259: Fractions

Fractions show a number in relation to how many parts there are. They are mostly used to show a number smaller than 1. However, whole numbers can be expressed as fractions as well. You can easily use ..

260: Economic Definitions

Utility: satisfaction derived from consuming a good. Profit: Profit = TR ? TC = Q(AR-AC). Normal Profit: profit that the firm could make by using its resources in their next best use (opportunity ..

261: Disk Compression

Zip Drive - can have 100MB or 250MB of storage space - they have the capacity of 72 floppy disks &nb..

262: CPU Architecture And Memory

There are two types of memory:1. Random Access Memory ( RAM )This stores tempory files and is where software is placed when it is loaded. A part of the RAM is allocated for the 'clipboard'. This is t..

263: Hardware/Peripherals

Hardware and peripherals are basically computer devices which add additional functionality to a PC.A Computer System is made up of a number of types of device. Computer devices are sometimes called P..

264: Numbers

Without numbers, mathematics can not exist. There are a variety of numbers which you are required to know about. Real NumbersThese are rational and irrational numbers. Rational NumbersThese will alw..

265: Resources (Factors of Production)

Land Natural resourcesPremisesLabourWorkforceThey are paid salariesCapitalArtificial resourceMade by labout Tools, machinery equipmentMoney invested into the businessEnterpri..

266: Nature of business activity

Output ? a business provides a good or serviceConsumption ? these are used by consumersResources ? are used up (land, labour, capital, and enterprise)Functions ? are carried out by the businessProdu..

267: Writing a business plan

The Business: Name, aims, type of business The Product: type, quantities, price The market: research results, size, who is target, competition (SWOT), methods of promotion/advertising Personnel: ..

268: Critical Essay: Step by Step Guide

During the long and turbulent period of study you can be ascended with different writing assignments. Some of them intend to teach you to generalize, some of them destined to develop more specific, d..

269: How to Love Writing?

"How do I start writing?". Everyone who had to produce a good writing was tormented with this question. My answer will be trivial - you start writing by taking a pen and beginning to c..

270: Making The Grade

"H ere--" I said, handing my mother my progress report as I walked into her room. I braced myself for the inevitably screaming I was sure to hear. "My teacher says you have to sign this..

271: Studying Your Study Environment

How familiar is this scene, "Sweetie, have you done your homework? Yeeeees Mom, I am finishing it right now!" You peek around the corner only to find the TV on, dim lighting,, and your st..

272: Managing Your Study Time

There are only so many hours in a day, a week, and a term. You cannot change the number of hours, but you can decide how to best use them. To be successful in school, you must carefully manage your st..

273: Making an Oral Presentation

When making an oral presentation in class, you must know your subject well and convince your audience that they have something to gain from listening to you. Here are some things you can do to make an..

274: Ten Steps to a Good Research Paper

To write a good research paper, you must be specific about your topic, know what you want to say, and say it effectively. Following these ten steps will help you write a good research paper. Step 1.C..

275: Using Acronyms to Remember Information

Forming an acronym is a good strategy to use to remember information in any order that can be remembered. An acronym is a word that is formed from the first letter of each fact to be remembered. It ca..

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