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## Homework Statement

Three capacitors of C1 = 6.7 micro-farads, C2 = 19.4 microfarads, and C3 = 9.3 microfarads are all connected in series to a 9 volt battery. The stored energy in C1 is found (U1s). The same three capacitors are connected in parallel to the same battery. The stored energy in C1 is found again in this configuration (U1p). What is the difference in stored energy in the parallel configuration compared to the series configuration in microjoules? That is determine U1p - U1s=

## Homework Equations

U1p = 1/2C1V^2

U1s = 1/2 Q^2/2C1

VCeq = Q

## The Attempt at a Solution

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Using the formulas I got U1p = 271.35 and U1s = 64.24. Thus U1p - U1s should equal 207.15 but the correct answer is 176.42. Can anyone see what I'm doing wrong?

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