Two charges, individual charge values?

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SUMMARY

In the discussion, participants analyze a physics problem involving two point charges separated by 3.0 cm with a total charge of 30 nC and an electric potential energy of -120 microJoules. The relevant equations provided include Uele = q1(kq/d) and Uele = qv. To solve for the individual charge values, one must apply these equations while considering the total charge constraint. The lesser and larger charges can be determined through systematic substitution and solving the resulting equations.

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1. Two point charges 3.0 cm apart have an electric potential energy -120 microJoules. The total charge is 30 nC. What is the lesser charge? What is the larger charge?



2. Uele=qv Uele=q1(kq/d)



3. My professor gave me these equations, I'm not entirely sure if they're the right ones. I haven't even attempted it - I just need help in figuring out how to work the problem. Thanks.
 
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xvie said:
Uele=q1(kq/d)
Use that equation, and the values given in the problem statement. You'll have to think about how the statement "the total charge is 30 nC" can be applied here.
 

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