If you lie on the ground at night with no cover, you get cold rather

[disneychannel]

If you lie on the ground at night with no cover, you get cold rather quickly. Much of this is due to energy loss by radiation. At night in a dry climate, the temperature of the sky can drop to -40^oC. If you are lying on the ground with thin clothing that provides little insulation, the surface temperature of your skin and clothes will be about 30 ^oC.


Estimate the net rate at which your body loses energy by radiation to the night sky under these conditions.


I know how to do the problem, but my issue is what area should I use? I have been using 1.8 m ² but it's not working out.

Thank You!

 

[K^2]

I think, that's typical surface area of skin all around the body. Only half is exposed to night sky, though. So try half of that.