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Consider the energy radiated from the Sun is balanced with the energy absorbed by the
Earth at the thermal equilibrium and the temperature on the surface of the Earth remains
constant. The distance from the Earth to the Sun is 1.5×10¹¹ m, the surface temperature
of the Sun is 5800 K, and the radius of the Sun is 7×10⁰ m. Find the surface
temperature of the Earth?
(a) 280 K
(b) 700 K
(c) 450 K
(d) 900 K

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