Convection Currents are a type of heat transfer created when the density of the molecules in a liquid layer of the earth change due to temperature. […]
Most stars are made of hydrogen.and Helium. THere are huge clouds of gas and dust in the Galaxies.They are called Nebula..Due to some reason mass gets […]
Cooler Giant forms ring called planetary nebula From nuclear fusion ##rarr## The energy released by heating of the helium core causes the outer hydrogen shell to […]
Both Moon’s day-night spin-period and its orbital period around Earth are the same 29.53 d and the same hemisphere faces Earth. The gradual day-night transit across […]