What is the mode of heat transfer during boiling or condensation? Justify your answer?
a. Consider a person standing in a room at 23 ∘C with an exposed surface area of 1.7 m 2.
b. The deep body temperature of the human body is 37 ∘C, and the thermal conductivity of the human tissue near the skin is about 0.3 W/m. ∘C.
c. The body is losing heat at a rate of 150 W by natural convection and radiation to the surroundings. Taking the body temperature 0.5 cm beneath the skin to be 37 ∘ C, determine the skin temperature of the person. [2+2]