Question Number 185601 by MCH last updated on 24/Jan/23
$${Hello}\:{please}\:{I}\:{experienced}\:{a}\:{little} \\ $$$$\:{difficulty}\:{with}\:{this}\:{question}.\: \\ $$$$ \\ $$$${A}\:{charge}\:{Qa}\:=−\mathrm{20}{mC}\:\:{is}\:{located}\:{at}\:\left(−\mathrm{6}\:\mathrm{4}\:\mathrm{7}\right)\:{and}\: \\ $$$${a}\:{charge}\:{Qb}=\mathrm{50}{mC}\:{at}\:\left(\mathrm{5}\:\mathrm{8}\:−\mathrm{2}\right).\: \\ $$$$\mathrm{I}{f}\:{distances}\:{are}\:{given}\:{in}\:{meters}\: \\ $$$${find}\:\left({a}\right)\overset{−} {{R}ab}\:\left({b}\right){Rab} \\ $$$$\:\left({c}\right)\:{The}\:{vector}\:{force}\:{exerted}\:{on}\: \\ $$$${Qa}\:{by}\:{Qb}\:\:{if}\:\:\varepsilon_{\mathrm{0}} =\mathrm{10}^{−\mathrm{9}} /\mathrm{36}\barwedge\:{F}\diagup{m} \\ $$