Questions

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The Indian Space Research Organisation is the space agency of the Government of India was set up in the year 1969, headquartered in the city of Bangalore. Its vision is to "harness space technology for national development while pursuing space science research and planetary exploration.

Guglielmo Marconi, an Italian invetor invented Radio in 1890's.

When heated any substance, the molecules move apart from each other. Alike in the air the molecules move apart from each other. We know that the warm air is lighter than the cool air. Since after heating air gets warmer, it floats up and the cool air comes down to occupy the warm air place.

Ozone layer depletion is one of the most serious problems faced by our planet earth. Substances that Deplete the Ozone Layer (ODS) emission are responsible for ultraviolet radiations from the sun break them to release chlorine (from CFCs) and bromine (from methyl bromide and halons).