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Given: 2 capacitors in a series, each capacitor's farad & voltage across.

Voltage uncertainty 1%, capacitor uncertainty 5%

C1: 1019microFarads C2: 553microFarads

V1: 3.58 volts V2: 6.56 volts

Uncertainty: 5% for CAPs & 1% for Volt

Find Q for each: Q1=3648 Coulombs Q2=3627 Coulombs

Find Q's +/-(variance): SQRT(.05^2 + .01^2) = .051

Q1 Variance: 186 Q2 Variance: 185

Now for the question:

find Q.total Q.total=C.eq * V.total => 3634.84

What is the Uncertainty of Q.total??

Does anyone know how to find Q.total's variance?

I've looked through my text and online, still no luck.

If anyone could make a suggestion, I'd be very appreciative.

Thanks

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# Homework Help: Calculating charge uncertainty

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