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Although Rutherford's model was enormously successful at explaining the scattering of alpha particles, there was a problem when the experimental data were used to calculate the mass of the nucleus. From the results of the scattering experiments, it was possible to calculate the charge on the nucle..

i) Quartz glass is used for manufacturing optical instruments. Under the trade name Vitreosil. ii) Colored quartz is used for manufacturing gems. iii) Sand is used in manufacture of glass, porcelain, sand paper and mortar etc. iv) Sand stone is used as a building material. v) Ki..

Commonly known substance such as vegetable ghees is hydrogenated oils. For their manufacture, they are treated with hydrogen at a temperature of 150-200 o C at a pressure of 5 atmospheres in the presence of finely divided nickel, which acts as catalyst. When the desired consistency is reached, the..

Nitrogen is also fixed as calcium cyanamide on heating it with calcium carbide at 1000C in an electric furnace. ..

. This type-of glass (trade-name-Pyrex/corning/Borosil) can withstand sudden changes in temperature and is used for making laboratory glassware. Another route to glass formation is provided by the sol-gel process. Glass is not a true solid and has no definite melting point. It softens whe..

"Night of the scorpion" is a poem that can be understood at two levels at one level, the poet describes how, on a rainy day the narrator's mother is bitten by a scorpion and what are the chain reactions to it. At another level, it depicts the India ethos and cultured richness through a simple ..

. He had a curved, cosy, and rounded body, dark liquid eyes. He had bushy little hands, complete with thumbs that cutie pie used with astonishing speed and skill. Cutie Pie became an instant celebrity - he was a commercial success sold as Cutie Pie dolls, colouring books, tee-shirts, fan clubs, cer..