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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
Atmosphere: Atmosphere is an envelope of the most useful gases that cover the planet earth. It makes our planet unique and enables life to prosper. If the earth did not have a
Explain Transport of Oxygen By Plasma At a tension of 100 mm Hg, 0.3 ml oxygen is dissolved in every 100 ml of blood. This small volume is negligible as far as the oxygen suppl
Define the Factors That Are Affecting Colour Perception The two most important factors which influence colour perception include: Temperature, and Humidity How do these factors
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Determine how nitrogen is useful in plant nutrients The supply of nitrogen is related to carbohydrate utilisation. If nitrogen supply is insufficient, carbohydrates will be dep
Personal Protective Devices : We shall now discuss the details of protective devices required for safety in a laboratory. The aim of protective devices is to minimise the risk of
Why did the continents spread apart? This is because of the heat generated from the earth's interior and earthquakes - the convection currents deep within the earth due to the
what the different types of volcanoes are?
types, principle and working
What are the functions of lymphocytes? The lymphocytes handle most of the bacterial and viral infection that we get. In fact, lymphocytes are directly involved with specific ac
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