Two protons are fixed in place along the x$-$axis, distance

r $=12\mathrm{.}0$ nm apart. Then an electron is placed midway

between them. Suppose that the electron is moved a dis$-$

tance d $=3\mathrm{.}0$ nm to the right along the x$-$axis. What is

the change in the system$$s electric potential energy $$EP E

that results from moving the electron? The symbolic an$-$

swer should be stated in terms of r$,$ d$,$ k$,$ and e$,$ though

not all of these quantities may be needed.

Please draw a Represtation and list the

Physics Concept$($s$)$

$(1)$

$(2)$

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