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<p>even though Newton's 1686 <a href="page.php?w=Philosophi%C3%A6_Naturalis_Principia_Mathematica">Principia</a> acknowledged that Hooke, along with Wren and Halley, had separately appreciated the inverse square law in the <a href="page.php?w=Solar_System">Solar System</a>, as well as giving some credit to Bullialdus.</p>

<p><big>Electrostatics</big></p>
<p>The force of attraction or repulsion between two electrically charged particles, in addition to being directly proportional to the product of the electric charges, is inversely proportional to the square</p><p>
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