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Making a simple reflecting telescope
A simple reflecting telescope can be made from a concave mirror obtained from a shaving mirror. The mirror is arranged wooden box of suitable size in such a way that it can be tilted at dissimilar angles. An upright made of wood is attached to the box so that its angle may also be varied. Two short focus lenses are fixed in corks which are then placed in a short length of mailing tube as an eye-piece. Then join this eye- piece attached to the wood upright exactly at the focal
Moisture evaporates from soil Fill a flower pot with moist soil and place it on a pair of scales. Either balances the pot of soil with weights or observe its weight. Observe it
Explain the Respiratory Centre The respiratory centre consists of two main parts - inspiratory centre and the expiratory centre. The inspiratory centre is dominant. A reciproca
Plaster of Paris Secure some plaster of Paris and mix a small amount with water. It must be worked quickly or it will harden whereas being mixed. Place the mixture in moulds an
Cosmic Distances: If we asked you what the distance between Delhi and Kanyakumari is, you would say that it is roughly 3000 km. Another way of answering the question would
Starch is not soluble in water ?? It forms colloid in aqueous medium called as micelles. Iodine reacts with both amylose and amylopectin, but the former produces a co
Define Natural killer cells (NK cells) They are large sized lymphocytes, specifically equipped to kill virally infected cells, some of the virally infected cells acquire a spec
Soil particle distribution The grouping of soil particle distribution into different groups has been done, though arbitrarily, each group represents a range. The limit does no
what do you mean by diffraction of light
Emergence of Urban Societies: The writings of this period also give us a picture of the social conditions. The social structure was undergoing radical changes at this time,
Define Nutrition To common man, the word 'Nutrition' implies food. Food is essential for growth and development. Physiology becomes an interlink between nutrition and healthy h
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