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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
Which type of rock is critical for the formation of geysers? Liquid rock is required for geysers to form in the form of what is known as magma - which is the geological name fo
What is clay minerals The fraction of secondary minerals is often mixed with primary minerals and oxides of iron, aluminium and silicon and has a size of less than 0.002
Solar energy: The energy we get today from the fossil fuels like coal, is in reality sun's energy, trapped in them millions of years ago. Plants make their food and grow bec
Explain the Apnoea Apnoea means cessation of breathing. Temporary apnoea may be seen in low carbon dioxide tension in blood. During swallowing, there is a temporary apnoea.
Nuclear Reactor: Nuclear fission can be maintaned as a controlled cjiain reaction in a nuclear reactor to produce energy. Fermi had found from experiment that slower moving
Explain Mucous membranes - External Defence Mechanism Mucous membranes: The digestive, urinary, genital and respiratory tracts open out at one or both ends. They do not have a
Mechanics: Another hnch of science which is, perhaps, the greatest contribution of Greek civilisation is mechanics. Mechanics developed out of the necessities of imgation,
How water acts towards fat Half-fill a tall glass jar with warm water. Add some olive oil or other oil to a depth of about 1 cm. Shake this mixture hard. View how the fat is br
Define Procedure for Estimation of Iron in the Solution? Carry out the experiment following the steps enumerated herewith: 1. Weigh 702 mg of reagent grade ferrous ammonium
how many times more nitrogen then oxygen in the air
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