حبايبي اتمنى منكم الاجابة على هذا السؤال لاني بصراحة ما عرفته .... وشكرآ لكم

[حسن عيسى]

the flax of primary cosmic rays averaged over the earth is surface is approximately 1 cm-2 s-1, and their average kinetic energy is 3 Gev . show that the power transferred to the earth from cosmic rays is about 2.5 gigawatt. (earth radius=6400km)