A human body has surface area approximately 1 m². Its normal temperature is 10 K above room temperature T₀. Take T₀=300 K and σT₀⁴=460 W m⁻², where σ is the Stefan-Boltzmann constant. Which options are correct?
Select all that apply

Question

A human body has surface area approximately 1 m². Its normal temperature is 10 K above room temperature T₀. Take T₀=300 K and σT₀⁴=460 W m⁻², where σ is the Stefan-Boltzmann constant. Which options are correct?

Select all that apply

G1 Physics · Accepted Answer

Use Stefan-Boltzmann law P=eσA(T⁴−Tₛ⁴), Wien's law λₘT=b, or Newton's law of cooling dθ/dt=−k(θ−θₛ), as applicable. Evaluating the given data/statements gives C: Reducing the exposed surface area of the body (e.g. by curling up) allows humans to maintain the same body temperature while reducing the energy lost by radiation. Therefore the correct answer is C.