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The Sun is the most important star from our point of view. It is the only star close enough to be studied in considerable detail. The grandeur of the Sun is partly because of its size. Its diameter is almost 110 times that of the Earth. We can best visualise the volume of the Sun if we realise that more than a million earths can be dropped into the space it occupies. As we have said above, the mass of the Sun is about 2 X 1033 grams, which makes it more than 300,000 times the mass of the Earth. The average density of the Sun, i.e.. its mass per unit volume, is about 1.4 g/cm3.
Although the Sun appears to be unchanging, it rotates about its axis once every 25 days. From time to time dark patches appear on the surface of the Sun, usually in pairsor in groups. These dark patches are called sunspots. Their movement is an indication of the Sun's rotation. This fact was recognised for the first tiine by Galileo. Actually, a sunspatis a regiim cn the surface of the S& that consists of gases almkt 10000c cooler than those surrounding the area. The number of sunspots increases and decreases in a cyclc every 11 years. In the long term, there are periods of low number of sunspots and High'number of sunspots.
Surgery: Susruta-Samhita, a.major treatise on surgery, was derived not only from exhaustive observation of symptoms of diseases and their possible treatments but also a fair
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#2 DESCRIBE THE APPEARANCE OF THE STOMATE AND THE GUARD CELLS.
Explain Error catastrophe theory of Ageing As the cells age, there is a random increase in error in protein synthesis due to insertion of wrong amino acids. They become non- fu
What Are the Constituents of the Intestinal Juice? Intestinal juice is also called succus entericus. The word succus means juice and entericus means intestinal. The digestive j
Define the Measurement of Extracellular Fluid Volume This method involves the use of dilution principle. A substance that can readily diffuse through the entire extracellular
Hormonal system: Most of us are not even aware that another system works constantly, along with the nervous system and the muscles, to direct our bodily functions. The system
What is relative location? Relative location is the location of something in relation of another place.
As glaciers erode the surface over which they move, sets of parallel linear grooves are sometime worn into the rock surface. These grooves are known as: Striations
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