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How to make a devil diver (Cartesian diver)
Find a tall glass jar with a quite wide mouth. Wrap a few turns of copper wire about the thin part of the rubber bulb from a medicine dropper. Fill the jar brim full of water. Put a little water in the bulb and float it in the jar of water. The bulb should have enough water to bring it nearly to the point of sinking. At this point approximately all the rubber will be under water. Considerable adjustment will be needed. Remove air from the bulb a bubble at a time by pinching the bulb.
Decline of the Bronze Age Civilisation: We find that the great developments in production methods that came with the rise of early cities lasted only f6r a few centuries. The
What is the earths core made of? Ans) The outer earth core is liquid and the inner is solid. Both parts are of alloy of two metals - iron and nickel, permitting the rise of the
working of calomel electrode
Explain what Diffusion is? Diffusion, we learnt is a simple process of movement of individual molecules from one region to another. Figure illustrates passive transport where m
ARAB RENAISSANCE: The Roman Empire had begun to decline. Its economy was overburdened by a huge army. Stagnating production had led to the imposition of heavy taxes. Consequentl
Define the Disorders of the Reproductive System Disorders that may affect the proper functioning of the reproductive system include abnormal hormone secretion, sexually transmi
Greenhouse effect: Scientists have reason to believe that air pollution. both due to carbon particles or soot and carbon dioxide would affect weather. A rise in surface temper
Determine about the soil humus The organic constituents (organic colloids) are due to mainly the plants and partly the animals. They form only a small fraction and get transfo
Explain Haemophilia Haemophilia is a disease characterized by excessive bleeding due to deficiency of clotting factor VIII. The patient need repeated blood transfusion or may
Enchinoderms classification for kingdom,Phylum,Class,Order,Family,Genus,Species
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