Physics

Problem

Three separate pairs of point charges are listed below: A.

+1\,\mu\text{C}

and

+1\,\mu\text{C}

separated by

30\,\text{cm}

+2\,\mu\text{C}

and

+0.5\,\mu\text{C}

separated by

20\,\text{cm}

+3\,\mu\text{C}

and

+3\,\mu\text{C}

separated by

60\,\text{cm}

Rank the magnitudes of the electrostatic forces between the charges in each pair from greatest to least.