A student in a lecture hall has 0.320 m2 of skin (arms, hands, and head) exposed. The skin is at 34.0°C and has an emissivity of 0.970. The temperature of the room is 29.5°C (air, walls, ceiling, and floor all at the same temperature). The Stefan–Boltzmann constant is 5.670 × 10−8 W/ (m2. K4 ).A) At what rate does the skin emit thermal radiation? in W B) At what rate does the skin absorb thermal radiation? in W C) At what rate does the skin absorb thermal radiation? in WD) Compare this to the total rate of heat flow from the body, which is about 100 W.______ % of total rate

in this question we determine emit radiation rate.

Answered: A student in a lecture hall has 0.320…

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter19: Temperature, Thermal Expansion And Gas Laws

Section: Chapter Questions

Problem 23PQ

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A student in a lecture hall has 0.320 m²of skin (arms, hands, and head) exposed. The skin is at 34.0°C and has an emissivity of 0.970. The temperature of the room is 29.5°C (air, walls, ceiling, and floor all at the same temperature). The Stefan–Boltzmann constant is 5.670 × 10⁻⁸ W/ (m². K⁴ ).

A) At what rate does the skin emit thermal radiation? in W

B) At what rate does the skin absorb thermal radiation? in W

C) At what rate does the skin absorb thermal radiation? in W

D) Compare this to the total rate of heat flow from the body, which is about 100 W.______ % of total rate

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