What is the net power radiated by a little animal with a surface area of 0.075 m² if his emissivity is 0.75,his skin temperature is 315 K,and he is in a room with a temperature of 290 K? (σ = 5.67 × 10^-8 W/m² ∙ K⁴) A)8.8 W B)6.0 W C)8.0 W D)15 W E)18 W

Question

Quizplus · Accepted Answer

The net power radiated by the animal can be calculated using the Stefan-Boltzmann law, which is given by $P = e\sigma A(T^4 - T_0^4)$, where $e$ is the emissivity, $\sigma$ is the Stefan-Boltzmann constant, $A$ is the surface area, $T$ is the temperature of the animal, and $T_0$ is the temperature of the surroundings. Plugging in the given values: $P = 0.75 \times 5.67 \times 10^{-8} \times 0.075 \times (315^4 - 290^4)$, we find that the correct answer is closest to 8.8 W, making option A the correct choice.

What Is the Net Power Radiated by a Little Animal