#### Question

Assume that the total surface area of a human body is 1.6 m^{2} and that it radiates like an ideal radiator. Calculate the amount of energy radiated per second by the body if the body temperature is 37°C. Stefan constant σ is 6.0 × 10^{−8} W m^{−2} K^{−4}.

#### Solution

Given:

Area of the body, *A* = 1.6 m^{2}^{ }

Temperature of the body,* T *= 310 K

From Stefan-Boltzmann law,

`"Energy radiated"/"Time" = sigma"AT"^4`

Here, *A* is the area of the body and `sigma` is the Stefan-Boltzmann constant.

Energy radiated per second = 1.6 × 6 × 10^{−8} × (310)^{4}

= 886.58 ≈ 887 J

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Solution Assume that the Total Surface Area of a Human Body is 1.6 M2 and that It Radiates like an Ideal Radiator. Calculate the Amount of Energy Radiated per Second by the Body If the Body Concept: Heat Transfer - Radiation.