Archive | Science

The technique of collecting information about an object from a distance, without making a physical contact with that object, is called remote sensing. Remote sensing is another area of application….

“Satellite communications” means “communications through the use of satellites”. The process of sending messages like radiotelephone, radio broadcasts, television broadcasts, Telex and Fax with…

It is because of the developments in the field of space science that the scientists have been able to probe (study) all the planets of the solar system from a close range. For example, the Voyager….

For a long time, the people did not know the nature of the element (or elements) of which the sun was made. So, all the earlier theories put forward to explain the source of sun’s energy were only a guess-work…

Galaxies are the building blocks of the universe. An astronomer called Edwin Hubble observed in 1920 from the Mount Wilson observatory in California (USA), that galaxies are not stationary in the…

The difference between Mendeleev’s and Long-form of periodic table are that elements have been arranged in order of increasing atomic mass in Mendeleev’s periodic table whereas in Long-form…

The frequency of a sound wave is equal to the frequency of the source which is producing the sound wave. It has been observed that the frequency of the sound waves produced by the same source…

The difference between Cathode rays and Anode rays are:

The age of solar system (including that of earth) has been estimated to be about 5000 million years by the radiometric dating technique which uses the phenomenon of radioactivity. This is described below….

The difference between Polar and Non-polar covalent bond  are that when a covalent bond is formed between the atoms of different electron pair is not equally shared by the two atoms…

The difference between Sodium ion and Sodium atom are Sodium ion is positively charged whereas Sodium atom is electronically neutral…

Differences between fission and fusion are in a fission reaction, a heavy nucleus breaks up to form two lighter nuclei. Nuclear fission is a chain reaction…

Differences between a Steam engine and a Petrol engine are Steam engine is an external combustion engine, in which the fuel (coal) is burned in the fire-box of the boiler, outside the cylinder…

The main features of Mendeleev’s periodic table are elements were arranged in order of their increasing atomic weights in horizontal rows called periods…

The difference between a compound and mixture are Compounds are always homogeneous whereas Mixtures can be homogeneous or heterogeneous…

The unit of measurement of energy is the same as that of work. That is, the S.I. unit for the measurement of energy is joule, which is represented by the letter J. One joule of energy is approximately…