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#Mon Aug 09 11:59:10 CEST 2010
Text__upr_cKOcEd-WfYQ0GneCwQ_title=E\u00F6tv\u00F6s Balance
Text__upr_cKOcEd-WfYQ0GneCwQ_text=<p>Heavy mass causes gravity; inert mass resists acceleration. The equivalence of both masses is the starting point for the General Theory of Relativity. This equivalence can be verified with the torsion balances developed by Lorand E\u00F6tv\u00F6s around 1900.</p>