Error in Thermodynamics CR Video

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dtufano
Posts: 25
Joined: Thu Nov 08, 2018 4:57 pm

Error in Thermodynamics CR Video

Post by dtufano » Wed Jan 09, 2019 10:30 pm

Hello! I noticed what I believe is an error in the CR video on Thermodynamics, video 4. In the table on pos/neg values for the internal energy of a system, it is listed that POS W is work done ON the system, and NEG W is work done BY the system. In both the physics book and the Lesson 10 video this concept is explained with work done by the system being POS and vice versa. I know this equation can be manipulated to have both Q - W and Q + (-W), which may be why things are mixed around, but nevertheless, just wanted to point this out. Thanks!
NS_Tutor_Will
Posts: 747
Joined: Fri May 25, 2018 9:15 am

Re: Error in Thermodynamics CR Video

Post by NS_Tutor_Will » Thu Jan 10, 2019 9:30 am

Thanks for your post! You seem to have a strong understanding of the concepts here. I've communicated your point with our content team and they'll have a look. We may want to make our content consistent in this area, but, since both ways can make sense as you pointed out, we'll see what is most useful.

In any event, thanks again for reaching out and good luck with your prep!
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