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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.
How to make a filter A plant pot with a plug of cotton wool in the bottom and a layer of sand a few inches deep makes a satisfactory filter for many purposes. Make some mudd
Ecological Crises: The natural atmosphere which man has inherited from the past, with healthy and fresh air, shielding from excessive radiation of the sun, has been deteriorat
The Maximum theoretical limit of channel is governed by Nyquist theorem, which says Bth = 2 x freq in hertz x log2L ( where L = number of level) Thus we have in this case Bth= 2x60
Disinfection of water streams originating from potable water plants is key in protecting environmental health. Describe the process design and application, along with potential pro
whats about body system
The term physiology -physio meaning native and logos meaning discourse, is a Greek word, a synonym for natural philosophy. As the evolutionary processes progressed, the need
How big is the Earth? The Earth size : is neither the largest nor smallest planet in our solar system. It is the largest of the non-gaseous planets (Mercury, Venus, Mars, and
Explain Bile Salts - Constituents of Bile The liver is the site for synthesis of bile salts. The amino acid glycine is synthesized in the body. Taurine is derived from the sulp
Explain the Hypersecretion during childhood Hypersecretion during childhood: Due to an increased secretion of the growth hormone, gigantism occurs. There is an excessive skelet
Microwaves : The microwave region of the electromagnetic spectrum is increasingly used for a variety of purposes for example, for rapid heating. The particular microwave ovens hav
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