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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.
Archaeological Evidence: The study of human antiquities, especially of prehistoric period is known as archaeology. The biological and cultural evolution of man proceeded side
Dating the Past: Today, that a particular rock is a million ycars old, or a fossil is 50 thousand ycars old. For instance, how do we estimate the duration of various geo
Explain Genetic Theory of ageing Rate of ageing varies between species. The difference is in the genetic changes in the species. Thus it can be said that gradual impairment of
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what is manipulating? What is responding variables?
Explain the Insulin Insulin is a hormone synthesized from the precursor called preproinsulin. Preproinsulin has four peptides. Insulin circulates in the blood in a free state.
Explain the amount of Glucose in Urine Detectable amount of glucose is only found in the urine when the blood level exceeds a certain threshold value i.e., 180 mgI100 ml. In un
Making a 'burp' bottle Fit a bottle or flask with a single-hole stopper which carries a funnel. Put the stopper firmly in the bottle and then pour water into the funnel. The bo
what does occur chemiial changes during cleavage?
What are the functions of insulin? 1. Promotes glucose transport into all cells of the body except brain. Rapid transport of glucose into the cells decreases the blood glucose
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