Assuming your skin temperature is 37.2°C and the temperature of your surroundings is 20.5°C, determine the length of time required for you to radiate away the energy gained by eating a 265 Calorie ice cream cone. Let the emmissivity of your skin be 0.915 and its area be 1.22 m2.

Question

? hours

Answer 1

Convert temperatures T1 and T2 to Kelvin and use the Stefan-Boltzmann law. Radiated power - absorbed power = (Area)*(sigma)*emissivity)*(T2^4 - T1^4)

"sigma" is the Stefan-Boltzmann constant, which you will need to look up.