$5.[0\mathrm{.}68/2$ Points$]$

SERCP$1116\mathrm{.}2.$P$\mathrm{.}015.$MI$.$

Two point charges $\backslash ($ Q$\_\{1\}=+5\mathrm{.}30\backslash$mathrm$\{$nC$\}\backslash )$ and $\backslash ($ Q$\_\{2\}=-2\mathrm{.}80\backslash$mathrm$\{$nC$\}\backslash )$ are separated by $55\mathrm{.}0$ cm $.$

$($a$)$ What is the electric potential at a point midway between the charges?

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$\backslash$mathrm$\{$V$\}$

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$($b$)$ What is the potential energy of the pair of charges?

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What is the significance of the algebraic sign of your answer?

Positive work must be done to separate the charges.

Negative work must be done to separate the charges.