Question

What is the net power that a person with surface area of 1.20 m2 radiates if his emissivity is 0.895, his skin temperature is 27°C, and he is in a room that is at a temperature of 17°C m2 radiates if his emissivity is 0.895, his skin temperature is 27°C, and he is in a room that is at a temperature of 17°C. (σ = 5.67 × 10-8 W/m2 ∙ K4)

Answer 1

Explanation:

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Answer 2

This question involves the concepts of Stefan-Boltzman's Law and the emissive power.

The net power emitted by the person is "62.55 W".

According to Stefan-Boltzman's Law:

$P=e\sigma A(T^4-T_o^4)$

where,

P = emissive power = ?

e = emissivity = 0.895

$\sigma$ = Stefan-Boltzman's constant = 5.67 x 10⁻⁸ W/m².k⁴

A = surface area = 1.2 m²

T = absolute temperature of the body = 27°C + 273 = 300 k

T₀ = absolute temperature of surrounding = 17°C + 273 = 290 k

Therefore,

P = (0.895)(5.67 x 10⁻⁸ W/m².k⁴)(1.2 m²)[(300 k)⁴-(290 k)⁴]

P = 62.55 W

Learn more about Stefan-Boltzman's Law here:

https://brainly.com/question/13491512?referrer=searchResults