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Because the atoms do not move around. The whole idea of convection is that 'groups' of things move about. In the case of heat convection these moving groups take or bring their heat with them.
About 50 minutes.
they move about 2 cm per year
Most convection currents exist in the mantle, the layer below the Earth's crust. As the semi-molten rock heats up, it rises closer to the surface, and it sinks as it cools. This is how plate tectonics works, as the crust's plates move on these currents.
Light travels 300 000km/s. That is 3x1010cm/s. So it takes 3,(3)x10-11 seconds or if you prefer, 0.0000000000(3)s.
A photon of light takes about a million years to escape from the Sun. This is because, as the photon makes a random move, it will hit another photon, and move off in another direction. Because of the density, and the amount of other photons, it can take this amount of time to reach the surface of the Sun. Once free of the Sun, the photon is unaffected and can "stream" out at the speed of light to wherever it wants to go.
Because the atoms do not move around. The whole idea of convection is that 'groups' of things move about. In the case of heat convection these moving groups take or bring their heat with them.
Convection take place because of convection currents
About 50 minutes.
Convection
Sure there can be conduction, but quite often, most of the heat will be transposrted by convection, not conduction.
month
Photons keep getting absorbed by other particle and then released in a completely random direction. This make the photon take a long time to finally pop out of the sun.
convection takas place wen iron piece is heated
Convection currents take place in the mantle.
yes
convection takes place in the outer core......... i think