What is the net power that a dog with surface area of 0.075 m² radiates if his emissivity is 0.75, his skin temperature is 315 K, and he is in a room with a temperature of 290 K? The Stefan-Boltzmann constant is 5.67 × 10^-8 W/(m²∙K⁴).

Question

Quizplus · Accepted Answer

The net power radiated is calculated using the formula: P = eσA(T₁⁴ - T₂⁴), where e is emissivity, σ is the Stefan-Boltzmann constant, A is the surface area, T₁ is the skin temperature, and T₂ is the room temperature. Substituting the given values, P = 0.75 * 5.67 × 10⁻⁸ * 0.075 * (315⁴ - 290⁴) ≈ 8.8 W.

What Is the Net Power That a Dog with Surface