Uses

physics Secondary

ELECTROMAGNETIC WAVES

DEFINITION AND CONCEPT Electromagnetic waves are produced by electromagnetic vibrations. Electromagnetic waves have electrical origin and the ability to travel in vacuum.  So, electromagnetic waves are regarded as a combination of traveling electric and magnetic forces which vary in value and are directed at right angles to each other and to the direction of travel.  […]

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Chemistry

Unsaturated Hydrocarbons – Alkenes

UNSATURATED HYDROCARBONS These are hydrocarbons in which carbon atoms join with each other by multiple bonds.  The multiple bond can be double bonds e.g Alkene or triple bonds e.g Alkyne. Ethene2 .Ethyne H – C = C – H                                       H – C = C – H H   H. Alkenes e.gEthene Nomenclature The process of naming

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paper 1100254 1920

SOURCE DOCUMENTS AND THEIR USES

A source document is the original record of transaction.it states the basic facts of the transaction such as its date, purpose (description of transaction), quantity of the goods exchanged, amount of money involved, name of the seller and buyer and so forth.   Uses of source documents For record purposes For accounting purposes For auditing

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Chemistry

OXYGEN (O2) PROPERTIES AND USES

OXYGEN (O2) PROPERTIES AND USES   Oxygen (O2) is an active, life-sustaining component of the atmosphere; making up 20% by volume of the air we breathe. It is colorless, odorless and tasteless. Oxygen is the most widely occurring element on earth. Because it forms compounds with virtually all chemical elements except the noble gases, most oxygen

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