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From our day-to-day experience, we come to know that a solid can dissolve faster if: a) The particles are smaller. b) The mixture is stirred or agitated. c) The solvent is at a higher temperature. So the fastest way to dissolve a solid in a liquid is to grind the solid into very tiny par..

Glass if cooled rapidly becomes brittle and fragile and if cooled very slowly becomes opaque because of devitrification. For this purpose, before making articles, glass is passed through a long tunnel like furnace that is very hot at one end and very cold at the other. When glass is passe..

Physics is a branch of science that deals with the nature and natural phenomena. The study of physics finds great importance in our day-to-day life. The laws, formulae and calculations of physics are not merely things to be remembered from the point of view of exams, but..

We come across many kinds of solutes, solvents and solutions in our day-to-day life. For e.g., we use solutes, such as salt and sugar, in beverages and other foods. A bottled soft drink usually contains sugar, carbon dioxide and other solutes, dissolved in a solvent i.e., water. We often ..

Solutes-Solvents-Solutions - We come across many kinds of solutes, solvents and solutions in our day-to-day life. For e.g., we use solutes, such as salt and sugar, in beverages and other foods. A bottled soft drink usually contains sugar, carbon dioxide and other solutes, dissolved in a s..

Along with warmer temperatures and higher humidity, the number of very hot days is expected to rise in many areas around the globe. Heat stress occurs in such conditions and the young, old and poor people are more susceptible to it. High temperatures will reduce work efficiency..

This is the domain of living organisms in contact with atmosphere, hydrosphere as well as lithosphere. Man has begun to effect significant changes in his natural environment mainly after the advent of the Industrial revolution. The change in industrial and agricultural practices in the last 300 ye..

i) Most deserts receive some rain every year but not uniform. ii) Light green covering of annuals is seen just after rains. iii) Have scanty vegetation, clear skies, hot days and extremely cold nights. iv) Soil is rocky and encrusted with sand or salt. v) Long periods without pr..

Estimation by orders of Magnitude of size (Length, Area and Volume) Mass, Time - In no subject does measurement play as important a role as in science. Real science cannot exist without measurement. According to Lord Kelvin, one of the greatest scientists, unless you can measure what you are speaki..

Moon is the natural satellite of the earth. It is our nearest neighbor in space, but it is still about 380,000 kilometers away. Its surface is covered with lots of craters. There is no air and no water on the moon. Days are extremely hot and nights are very cold. As the moon is ..