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## Homework Statement

The solar constant is the amount of energy from the Sun we receive on the Earth during each second on a 1.000 m2 area oriented perpendicular to the direction of the sunlight. The value of the solar constant is about 1.37 kW/m2. Imagine sunlight illuminating an asphalt pavement as indicated in Figure P.63. The ambient temperature is 30°C. What is the equilibrium temperature of the asphalt? Assume the asphalt is a blackbody.

Answer is in Celsius*

## Homework Equations

Stefan's Law: dQ/dt = -e(A)([tex]\sigma[/tex])(T^4)

where [tex]\sigma[/tex] = 5.670 x 10^-8 W/(m^2 x K^4)

Blackbody radiation so the e value should be 1.

## The Attempt at a Solution

I don't understand how to incorporate the solar constant into the equation. Is the area just 1m^2? I'm lost! =( PLEASE HELP! THANK YOU.