Asphere has surface area 1.25 m2, emissivity 1.0, and temperature 100.0°c. what is the rate at which it radiates heat into empty space? the stefan-boltzmann constant is 5.67 × 10-8 w/(m2 ∙ k4). a.) 9.9 mw b.) 3.7 w c.) 7.1 w d.) 1.4 kw

The total power emitted by an object via radiation is:

where:
A is the surface of the object (in our problem, 
is the emissivity of the object (in our problem, )
is the Stefan-Boltzmann constant
T is the absolute temperature of the object, which in our case is 

Substituting these values, we find the power emitted by radiation:

So, the correct answer is D.

Ibelieve the answer is b