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# Earth receives energy from the Sun at an average rate of about $240 \mathrm{~W} / \mathrm{m}^2$. Given Earth's average temperature of $15^{\circ} \mathrm{C}$, find the rate of entropy increase associated with this energy flow.

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We are to find the rate of entropy increase with the energy flow from the solar irradiance. The Earth receives energy from the Sun with the flux $\Phi = 240~\frac{\rm W}{\rm m^2}$. The Earth's average temperature is $T = 15~^\circ\rm C = 288~\rm K$.

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