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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.
Explain Cardiac Compression - Decreased Cardiac Output Rapid accumulation of fluid in the pericardial sac decreases ventricular distensibility leading to a decrease in cardiac
how does it get into the earth?
Define Hyposecretion of Adrenocortical Hormones Hyposecretion of hormones from the adrenal cortex results in the development of the condition known as Addison's disease. There
Explain the Hypoxic Hypoxia It is a hypoxia resulting from defective oxygenation of the blood in the lungs. It is a problem in high altitudes where pO 2 of the arterial blood
Question 1: (a) Define the following terms: normal baseline, internal waters and territorial sea. (b) List four responsibilities of the coastal state within the territoria
To show the presence of nodules of nitrogen-fixing bacteria on the roots of legumes Carefully spade up some leguminous plant like as clover, alfalfa, soy-beans, cow peas, etc.
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carefully analyed the device sources of documentory data for geographic research
a) Name the primary minerals present in an igneous rock. a ) Quartz (SiO2), feldspars, amphiboles, pyroxenes and micas are the most common primary minerals in igneous rock
Requirements Screw driver - 1 Wire stripper - 1 6/16 A Plug -1 Electrical appliance (any, without plug) - 1
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