Physics problem: body heat loss via radiation

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Homework Help Overview

The discussion revolves around a physics problem related to body heat loss via radiation, specifically focusing on the calculations involved in determining net loss over a specified time period.

Discussion Character

  • Exploratory, Problem interpretation

Approaches and Questions Raised

  • Participants are attempting to clarify the calculations presented by the original poster, questioning the format of the work shared and seeking to ensure it is correctly interpreted. There is also a mention of the expansion of temperature variables, indicating a potential area of exploration.

Discussion Status

The discussion is ongoing, with participants actively trying to assist the original poster by addressing issues with the presentation of the work. There is a focus on ensuring clarity and proper interpretation of the problem, with some participants noting the existence of a duplicate thread.

Contextual Notes

There are indications of formatting issues with the work shared, which may hinder the review process. Additionally, the presence of a duplicate thread suggests that there may be overlapping discussions on the same topic.

crystal1001
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Homework Statement
A student is trying to decide what to wear. His bedroom is at 20°C. His skin temperature is 35°C. The area of his exposed skin is 1.50 m2. People of all races have skin that is dark in the infrared, with emissivity about 0.900. Find the net energy loss from his body by radiation in 10.0 min.
Relevant Equations
q = ε σ T4 A
σ = 5.6703 10-8 (W/m2K4) - The Stefan-Boltzmann Constant
I do not know where I am doing wrong. I asked a tutor, he said I was doing it correctly.
Below is my work. Please help!

Net loss by radiation in 10.0 mins is 74.8 kJ
 

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So, you are asking for the favor of someone checking your homework and you're going to make it hard for them by posting it sideways? Doesn't really seem like a good idea.
 
corrected it.
 
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Likes   Reactions: phinds
crystal1001 said:
corrected it.
It's still sideways for me. Maybe try taking a screenshot of it after you rotate it, and attach the screenshot. I'll try to do that now...
 
Here's the work picture rotated and contrast-enhanced. I'll look to see if we should merge the duplicate thread...

1573149650680.png
 
What's the expansion of T plus (or minus) delta T?
 

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