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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 the Regulation of Thyroid Hormone Secretion TSH from the anterior pituitary gland controls the secretion of thyroid hormones. Thyrotropin Releasing Factor (TRF) from th
Question 1 Illustrate the concept of Economic Order Quantity Question 2 Omega Healthcare is planning to open a hospital in North Bangalore region. For this purpose t
In Fehling's Test The free sugar group (aldehyde or ketone) reduces the Cu (cupric) ions in an alkaline environment to form Cu 10 (cuprous oxide) and the sugar is itself ox
Explain the Special Examination of Urine The special examination requires the determination of various chemical substances in the urine including amino acids, bile pigments and
TO LEARN THE USE OF A CARBON DIOXIDE FIRE EXTINGUISHER : All chemical laboratories should be provided with carbon dioxide and or dry chemical fire extinguishers. Carbon dioxide fi
Germinating pollen grains Apparatus Used-Make a strong sugar solution and place it in a shallow dish like a saucer or Circular Plate. Shake pollen from several Different kinds
State the term- Weathering Weathering refers to the combined activity of destruction and synthesis of rocks. Natural weathering processes occur around us everyday, continually
THE HEART PUMPS BOODS EVERY MINUTE AND EVERY SECOND OF THE DAY WITHOUT RESTING
What process do plants build up carbohydrates by?
What is the difference among a canyon, gorge, and valley? The easiest way to answer this is to describe each term, so you can see: 1) A canyon is a deep valley with steep si
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