Question

Find the net rate of heat transfer by radiation in watts from a skier standing in the shade, given the following. She is completely clothed in white (head to foot, including a ski mask), the clothes have an emissivity of 0.205 and a surface temperature of 11.4°C, the surroundings are at −17.0°C, and her surface area is 1.50 m2.

Answer 1

-34.5 W

Step-by-step explanation:

rate of heat transfer = Stefan-Boltzmann constant x emissivity x surface area x temperature^4

`P = \alpha eA(T_(f) ^(4)- T_(i) ^(4)) = 5.67*10^(-8) *0.205*1.5(256^(4) - 284.4^(4) ) = -34.5 W`