Details'Verifies Coulomb''s Law of the Force Between Charges by Direct Measurement. Suspend one sphere from the top of a box -rest the other on the bottom. Bring them together and the hanging sphere deflects from the other. Students precisely measure deflection with an easy-to-read ruler -and so calculate the force. A mirror assures accuracy by eliminating parallax. The apparatus is fully assembled and self-contained.'
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Catalogue Number EACL0000 Size No Pack PC