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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.
Locate Polaris, the North star, and comment on it's elevation over the Northern horizon. Using the keyboard controls (J, K and L keys), fast forward the program 6 - 12 hours and c
Explain the law of diminishing return. The increase in the yield by a unit increase of the deficient factor is proportional to the decrease from maximum.
Balanced diet: We have dealt with quality and quantity of food. Both of these should be balanced in a diet. A balanced diet is a combination of various foods which can fulfil
Describe the factors which decide the broad area of Scientific activity?
What is hydrolysis Fats when boiled with water at 220°C under pressure in an autoclave, undergo hydrolysis to first form a diglyceride and then ultimately glycerol an
Explain the Process of Secretion In the process of filtration through the glomerulus, the non-threshold substances and drugs are not cleared from the blood because the blood do
A wound should be cleaned first and covered with a protective dressing. The main purpose of dressing is to: (1) prevent infection, (2) control bleeding, (3) absorb any dis
Holding water in a sieve Pour some oil over the wire mesh of a kitchen sieve and shake out the overload so that the holes are open. Cautiously pour water into the sieve from a
Question 1 What is the role of Clinical Research Associate (CRA) in a Clinical Research Organization? Question 2 List the events prior to Site Close Out. What is the role of
Mechanism of Secretion of Gastric Juice There is always a small quantity of gastric juice present in the stomach even when there is no food in the stomach. This is known as fa
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