# Physics Problem NEED HELP!!!!!!?

Physics Problem NEED HELP!!!!!!?

It takes 4.0 uJ of work to move a 11 nC charge from point A to B. It takes -6.5 uJ of work to move the charge from C to B.

What is the potential difference VC - VA?

VC - VA = ___V

Update:

@ D g: Thats not the right answer. my hw problems are online based and its not accepting that answer.

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it actually is the answer the units are slightly wrong

11 nC = 11 * 10^-09

and 4.0 uJ = 4.0 *10^-6

W = qV is the point charge work formula

4.0 uJ = 11*10^-9*Va

Va = 4.0*10^-6/11*10^-9volts

Va = 3.6 * 10^2

the other is

-6.5 uJ = 11nC * Vc

Vc = - 6.5*10^-6/11*10^-9 volts

Vc = -5.9*10^2

V = Vc - Va = -5.90*10^2 - 3.6*10^2 = -9.5*10^2

sorry about the unit screw up

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