Assertion: universe's volume | /r/HasProperty | exploited for millennia
Facets:
value: widely
type: DEGREE
value: to define standard weights
type: PURPOSE
Source sentences:
text: Using such tools, some quantitative force laws were discovered: that the force of gravity is proportional to volume for objects of constant density (widely exploited for millennia to define standard weights); Archimedes' principle for buoyancy; Archimedes' analysis of the lever; Boyle's law for gas pressure; and Hooke's law for springs.