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Hey guys having some trouble with this question its a new topic in my course
The Earth receives solar radiation at a rate of 342 W/m2 averaged over the total surface of the Earth. About
30% of this radiation gets reflected back into space while the rest is absorbed. For the Earth to maintain thermal
equilibrium (not to heat up), the absorbed energy must be transferred back into space.
a) With reference to the heat transfer mechanisms briefly describe how this transfer must occur
(1-2 sentences).
b) How much power per square meter must be transferred back into space to maintain thermal equilibrium?
c) If we treat the Earth as a black body ob ject (with emissivity e = 0.602) radiating out into space, calculate what
the average temperature the surface of the Earth must be in order to lose this amount of heat.
The Earth receives solar radiation at a rate of 342 W/m2 averaged over the total surface of the Earth. About
30% of this radiation gets reflected back into space while the rest is absorbed. For the Earth to maintain thermal
equilibrium (not to heat up), the absorbed energy must be transferred back into space.
a) With reference to the heat transfer mechanisms briefly describe how this transfer must occur
(1-2 sentences).
b) How much power per square meter must be transferred back into space to maintain thermal equilibrium?
c) If we treat the Earth as a black body ob ject (with emissivity e = 0.602) radiating out into space, calculate what
the average temperature the surface of the Earth must be in order to lose this amount of heat.