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The Copernican Revolution:
It was right in the midst of these developments in the fifteenth century, that there came the first major break from the whole system of ancient thought. This was the work of Copernicus, who gave a clear and detailed explanation for the rotation of earth and other planets on their axis and their motion around a fixed sun which was at the centre. This model simplified astronomical calcuhtions, and also made them more precise. In such a model had been proposed by Greek astronomers like Aristarchus many centuries earlier. However, it was not given any importance because it ran counter to the established ideas of those times. This work of Cope~nicus was published in the very year of his death in 1543. Although his book attracted limited attention and there were objections to his model, his work-gave a great boost to further work by Galileo. We will talk about Galilee's work later in Sec. This was the first phase of what we now call the Scientific Revolution. In this phase, the old ways of thought were proving inadequate. By rejecting the old ideas, the men of Renaissance had cleared the grounds for new ideas of the succeeding century. In the use of science for practical purposes too, the Renaissance set the scene for. future developments. From now on science had become a necessity for profitable enterprises, trade and war.
Gases : Critical temperature is the A substance which has a critical temperature below 50°C, has a vapour temperature above which pressure of more than 3 bars absolute (highly
A Cloud Made of Comets The cold outer areas beyond Pluto are the regions of comets, those visitors that dash, around the Sun, seldom to be seen again. Comets are of grei3t
Explain what is INFECTIVE ENDOCADITIS ? Infective endocarditis could occur on-native valve - native valve endocarditis (NVE) or on a prosthetic valve (Prosthetic Valve Endocard
Define Calculi and casts - abnormal constituent of urine An abnormal concretion in the body usually formed of mineral salts and found in the gall bladder, kidney or urinary bla
Determine about the Capillary forces Capillary forces are observed in all moist soils, however, the rate of movement and the rise in height may sometimes be less than one would
Explain the texture of igneous rocks? There are four main textures of igneous rocks which are used to classify them. The rate of cooling and crystal growth account for the diff
What is Soil Aeration Whatever may be the structure of aggregate, it introduces pores in the soils. These pores are filled by air and/or water and have a role in the plant grow
What is the pH of an acid
The buoyancy of water Find a metal can like a coffee can or a cigarette tin which has a tightly fitting cover. With the cover on, push the can into a pail of water, cover end d
Explain Immune System The animals and the human beings are forced to encounter many dangerous microbe in their day-to-day life, through water, air and food. Inside our body the
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