Two protons are shown in the figure below separated by a distance of 1.00 nm. An

Question

Two protons are shown in the figure below separated by a distance of 1.00 nm. An electron is positioned 2.0 nm away from the midpoint between the protons. (Figure 1)

PEelectron = ?2.2410?19J

What was the work required to arrange the two protons in this manner before the electron was added?

Work = ? J

Two protons are shown in the figure below separated by a distance of 1.00 nm. An electron is positioned 2.0 nm away from the midpoint between the protons. (Figure 1) PEelectron = ?2.24½10?19J What was the work required to arrange the two protons in this manner before the electron was added? Work = ? J

Explanation / Answer

The question asks only for the work done to put the protons in place, so the electron doesn't matter in this question.
F=k|q||q|/r^2
F=k(1.602*10^-19)^2/(1.0*10^-9)^2

F=2.31*10^-10

W=Fdcos(theta)
theta=0
cos(0)=1

W=2.31*10^-10*1.0*10^-9

W=2.31*10^-19 J

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