Question 11 Mark
Assume that the total surface area of a human body is $1.6m^2$ and that it radiates like an ideal radiator. Calculate the amount of energy radiated per second by the body if the body temperature is $37^\circ C.$ Stefan constant $\sigma$ is $6.0 \times 10^{-8}Wm^{-2}K^{-4}.$
Answer
View full question & answer→$\text{A}=1.6\text{m}^2,\ \text{T}=37^\circ\text{C}=310\text{K},$
$\sigma=6.0\times10^{-8}\text{w/m}^2\text{-K}^4$
Energy radiated per second
$=\text{A}\sigma\text{T}^4=1.6\times6\times10^{-8}\times(310)^4$
$=8865801\times10^{-4}$
$=886.58\approx887\text{J}$
$\sigma=6.0\times10^{-8}\text{w/m}^2\text{-K}^4$
Energy radiated per second
$=\text{A}\sigma\text{T}^4=1.6\times6\times10^{-8}\times(310)^4$
$=8865801\times10^{-4}$
$=886.58\approx887\text{J}$