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Atomic energy:
In view of the fast depletion of our non-renewable resources like coal and petroleum, and because of pollution which power stations burning coal cause, there has been a move to use other means of obtaining energy. Since the energy of the atom had already been unleashed in the form of a bomb, efforts were made to release atomic energy in a controlled manner. The device used for this purpose is called an atomic reactor. Nuclear reactors produce heat, which is commonly used to raise steam, which rotates turbines and generators of electric power. It is estimated that 1 kg of natural uranium, written as U23, generates energy equal to that produced by 35,000 kg of coal. Thus production of energy from nucrear fuel like uranium is efficient, and since great loads of coal or diesel are not consumed daily, this energy is convenient. Nuclear reactors need to be situated at places far away from habitations. They have to be operated under strict safety control, so that there are no accidental leakages of radioactive material. The radioactive wastes have to be carefully disposed off. India is very short of energy and all of you may have heard or experienced power cuts or load-shedding. We have plans to set up several nuclear reactors to generate a good position of our total power requirement.
State about the carbonaceous and nitrogeneous materials The basic ingredients of these are either animal or human excreta containing microorganisms which decompose carbonaceous
Mechanical or Physical Weathering Processes A rock broken into smaller pieces is said to be physically or mechanically weathered. It has a large exposed surface area which fur
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Water Resources: Water, as you know, is the most essential component of life. Our water resources are limited, though apparently, water is available in an abundant quantity.
Another way to observe the buoyancy of water Push a large cork to the bottom of a pail of water. Notice the quantity of force you have to apply to hold the cork at the bottom.
How to make an overflow can and catch bucket These are useful for the study of Archimedes' principle, which controls floating and sinking. To make an overflow can secure a tin
Nature of scientific knowledge: Science, as we have seen, is inseparable from the rest of human endeavour. In the past few thousand years of human history, an immense fund of
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Explain Increase in Sound Wave Pressure through Middle Ear There are certain factors which contribute to an approximately eighty-fold increase in sound wave pressure through mi
Pluto: Pluto's existence was also proposed to account for deviations in the orbit of Uranus. Even after the influence of Neptune~had been accounted for, an American astron
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