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 W D) Compare this to the total rate of heat flow from the body, which is about 100 W.______ % of total rate
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 W D) Compare this to the total rate of heat flow from the body, which is about 100 W.______ % of total rate
College Physics
1st Edition
ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
Publisher:Paul Peter Urone, Roger Hinrichs
Chapter14: Heat And Heat Transfer Methods
Section: Chapter Questions
Problem 62PE: The Sun radiates like a perfect black body with an emissivity of exactly 1. (a) Calculate the...
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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
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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