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Geometry and Astronomy:
The need to portray an ideal world of perfect forms and proportions led to the development of geometry by Pythagoras (583-500 B.C.) and Hippocrates of Chios (about 450 B.C.) (Fig.). 'The latter occupied himself with the solution of problems which were unanswered for a long time. such as squaring the circle and doubling the cube. He failed in both. but opened the w;ly to study the geometry ofcurves. Eudoxus (408-355 B.C.) was probably the greatest Greek matliematician and he was able to explain the motion of sun, moon and plancts by means of sets of concentric spheres, each rotatingabout an axis fixed in the one outside it (Fig. 3.12). The model wascrude, and too simple to explain observed facts, even as known at that time. But the sets of actual metal spheres based on this mode provided the basis for most of the astronomical instruments for a long time.
which nutrient contains carbon, hydrogen, oxygen, nitrogen and sometimes sulphur and phosphorus?
define carbohydrates.give a brief account on classification of carbohydrates.
Objectives After completing this exercise you will be able to: 1. Sterilize and dispose off microbial cultures, 2. Dispose off the carcass of laboratory animals and the e
Nucleic acids are polymers of nucleotides. Nucleotides are nucleoside phosphates.
Nature of scientific knowledge: Science, as we have seen, is inseparable from the rest of human endeavour. In the past few thousand years of human history, an immense fund of
What is polychaetes digestion/feeding ?
Putting a point on a brush Secure a paint brush of some sort and get the bristles. Now dip the brush in water and you will view that surface tension has drawn the bristles tog
Need for Code of Behaviour : A laboratory is a potentially dangerous working environment. Cuts from broken glass, chemical or thermal burns and poisoning are three examples of lab
Explain what Diffusion is? Diffusion, we learnt is a simple process of movement of individual molecules from one region to another. Figure illustrates passive transport where m
what are some easy examples of a solstice
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