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The sun delivers about 1.4kW m^(-2) of e...

The sun delivers about `1.4kW m^(-2)` of electromagnetic flux to the earth's surface. Calculate
A. the total power incident on a roof of dimensions `8mxx20`m.
B. the solar energy in joules incident on the roof in 1h.
C.the radiation pressure and force assuming the roof to be a perfect absorber.

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