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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
Floating bodies Fill the overflow can with water and let it run out unless the surface is level with the spout. Select a piece of wood that floats half or more submerged in the
Ask question #Minimumwhat is that definition for cell theory? 100 words accepted#
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The Origin of Agriculture and Civilisation : There is no historical evidence to tell us exactly how agriculture arose. We can only imagine what may have happened. Cultivatio
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Depletion of Ozone Layer: Since the last decade or so, there is concern about the possible reduction in the ozone layer surrounding the earth. Now the question arises, what h
Management of Water Resources Management: Management of Water Resources Management of water resources means a programme to provide an adequate supply of good quality of water
Procedure : A mock fire may be created by spilling a flammable liquid like alcohol, petrol etc. and lighting it at a safe place away from the equipments and working benches. Th
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