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Question
Calculate the temperature the entire sky would have to be in order to transfer energy by radiation at $100\textrm{ W/m}^2$ — about the rate at which the Sun radiates when it is directly overhead on a clear day. This value is the effective temperature of the sky, a kind of average that takes account of the fact that the Sun occupies only a small part of the sky but is much hotter than the rest. Assume that the body receiving the energy has a temperature of $27.0^\circ\textrm{C}$.
$127^\circ\textrm{C}$
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