Question

An unclothed person whose body has a surface area of 1.40m^2 with emissivity of 0.85 has a skin temperature of 37°C and stands in a 20°C room. How much energy does the person lose per minute?

Answer 1

Solution

Energy loss is given by

$P=\epsilon A\sigma(T^4-T^4_{room})$

Putting all values

P=7.6KJ