Scientific Appliances And Their Working Principles

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Scientific Appliances And Their Working Principles


Aeroplane: An aeroplane usually consists of the following three parts: (i) Wings, (ii) The engine and the propeller; and (iii) The tail. Working: In order to operate an aeroplane, the propeller is made to revolve at a very high speed with the help of a powerful petrol engine. The direction of the blades is so adjusted as to push the air in a backward direction, thereby producing a relative velocity between the ’plane and air—thus pushing the aeroplane in a forward direction. The push should be large enough to overcome the drag  and should supply power for climbing.


Air conditioning: is the process of controlling the humidity, temperature, purity and circulation of air in a certain factory, a public building, hotels or a private house. The major aim of air-conditioning is to regulate the temperature, thereby producing a “cooling effect” on the whole. Exhaust machines are devised at a particular place for driving out waste and dirty gases, thereby completely purifying the air.

Binoculars: is an instrument used for seeing distant objects; the rays of light are twice reflected by means of right-angled prisms.

Carburettor: It is an apparatus for getting liquid fuel mixed with air as it is taken into an automobile or other like engines.

CD-Rom: It is a computer peripheral device that employs compact disk technology to store large amounts of digitized data for later retrieval.

Cellular Phone: This phone allows you to make a telephone while on the move. It....

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