Magnifiers Perhaps the simplest optical instrument is the lens magnifier. Without optical aid, we cannot “see” things close up. The eye will simply not focus closer than about 0.25 m (unless you are nearsighted!). But an object places just inside the focal point of a converging lens will produce a large virtual image that can
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Definition of Party System: Refers to a political arrangement in which government can only be constituted upon the election of a political party in democratic electoral setting. A party system is a concept in comparative political science concerning the system of government by political parties in a democratic country. TYPES OF PARTY SYSTEM ONE PARTY/SINGLE PARTY SYSTEM: It
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Introduction A triangle can be constructed with a compass, a ruler and a protractor. You also need some squared paper and a pencil. At first you need an overview of the information about the triangle you have. A good place to start is by drawing the base line, which is the basis of the further
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Introduction We observe many things in our day-to-day life. Surface Tension Phenomenon is one among them. Often we confuse the Phenomena of Surface tension with Buoyancy. Both the phenomena are entirely different to each other in the sense, in Buoyancy a portion of the body gets dipped in the liquid whereas in Surface tension the body will
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The Need for Statistics – Statistical Data Suppose a stranger asks you for information about yourself. You could say lot of things. For example: your name, the town you live in; the school you go to; what you ate last night; the things you like; the things you don’t like; etc. You might also use
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Introduction You must have seen a broken down vehicle in your town or village. Assuming this car is to be taken to a nearby mechanic village, what do you think must be done to it? To make the broken down car move to the mechanic village, you have to push it or get a towing
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The /i:/ sound The /i:/ sound is always spelled ‘ee’ or ‘ea’, but in some other ways also. Say the following: need meat chief police meet please piece machine green these believe deceive The following words contain the /I/ sound , which is usually spelled “i”. Say them is did this fit quick which
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INTRODUCTION A person who uses computer sometimes face many problems if the computer is used for a long period of time. The problems may be health related, like headache or vision problems and waist pain. ERGONOMICS Ergonomics is the study people, their physical character and the ways in which the function in relating to their
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The Meaning of a Store A store can be defined as a place where goods are kept for future use. A store house is also known as the warehouse. It is a place that must be easy to reach and good for safekeeping of items. The items kept in the store house are: raw materials,
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Introduction Alkanols (or alcohols) are a homologous series of organic compounds with the general formula CnH2n+1OH or simply ROH. Their molecules consist of a functional group — the hydroxyl group (—OH) joined to an alkyl group (R—). They can be used to fuel cars as they are flammable. Unlike alkanes, alkenes and alkynes, alkanols are
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