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 […]
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. […]
Please check the explanation … As the solar nebula collapsed gravitationally its core region becomes dense and denser gets heated and its temperature and pressure increase […]