Conduction with thermal energy generation

AI Thread Summary
The discussion revolves around a homework problem related to conduction and thermal energy generation, where the poster is struggling to identify errors in their calculations. They initially used a heat transfer coefficient of 250 W/m^2*K instead of 350 W/m^2*K, which may have contributed to their incorrect results. Despite following the solution manual and checking their work, the poster remains uncertain about the source of their mistake. Other participants are encouraged to help identify potential errors in the calculations. The conversation emphasizes the importance of clarity in presenting mathematical problems, especially for mobile users.
yecko
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Homework Statement


I am wrong in my attempt, yet I can't figure out the reason why...
View attachment 230978

Homework Equations


View attachment 230979
(solution with h=250 W/m^2*K instead of 350 W/m^2*K)

The Attempt at a Solution


View attachment 231065
This is how I obtain the answers, which I checked all the calculations and I don't think there is numerical problem. I followed the steps in the solution manual, yet I am wrong and I don't know why.

Can anyone see anything going wrong here?
thank you so much!
 
Last edited:
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The rules say that images should not be used in place of text. They can be hard to read for people using phones to access PF, but your images are pretty clear, so we'll allow them.

When you compose a new post, a button "LateX" at the lower left allows you to enter math directly.
 

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