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Nuclear Fission:
Splitting the Atom You know that atoms are made up of a nucleus and electrons moving around the nucleus, and the nucleus is made up of protons and neutrons. The principal actor in the fission drama is the uranium atom. The nucleus of the Uranium 238 atom has 92 protons and 146 neutrons. About one atom in 140 atoms of uranium has 143 neutrons in its nucleus. lt is called Uranium 235. It is the Uranium 235 that is mostly used to provide fuel for nuclear furneces. Before the Second World War, two German scientists discovered that if neutrons were shot at the nuclei of Uranium 235, the nuclei split into two and produced other neutrons to repeat the process. This is called nuclear fission.
Ionising Radiations " The three types of ionising radiations mentioned above penetrate matter to different extent. Table summarises the nature, ionising power and penetration of th
Define the visual area of the Cerebrum The visual area lies behind the parieto-occipital sulcus and includes greater part of occipital lobes. Optic nerve passes from eyes to th
Specific gravity of a liquid not mixing with water Pour oil into an open glass tube partially immersed in water until it forces water as far as the lower end. The relative leng
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Competitive inhibition This type of inhibition takes place when a compound having a strong structural resemblance to the substrate competes with it for the catalytic site
Define Benefits and Constraints of Multicellular Organisms Some of the benefits and constraints of multicellular organisms are as follows: 1) There is a unique co-ordination
Explain the Creatinine Clearance Test It determines how efficiently the kidneys are clearing creatinine from the blood and serves as an estimate of kidney function. It compare
what is postcranial
Explain the Complement System To remove a microorganism by phagocytosis requires phagocytes at the right place in the right time. The organism should adhere to the phagocyte. M
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