8.47


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Ammarah 2H
Posts: 30
Joined: Fri Sep 29, 2017 7:06 am

8.47

Postby Ammarah 2H » Thu Jan 18, 2018 1:12 pm

How do you know that the work is a positive value for #47?
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Kyle Sheu 1C
Posts: 87
Joined: Fri Jun 23, 2017 11:39 am

Re: 8.47

Postby Kyle Sheu 1C » Thu Jan 18, 2018 2:25 pm

When work is done on the system, energy is being input, so we can think about it as a positive change in the system's energy
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