Assertion: coulomb's law | /r/HasProperty | confirmed by accurate methods
Facets:
value: since
type: TEMPORAL
Source sentences:
text: Coulomb, who by using very long and thin magnets, so arranged that the action of their distant poles was negligible, succeeded in establishing the law, which has since been confirmed by more accurate methods, that the force of attraction or repulsion exerted between two magnetic poles varies inversely as the square of the distance between them.