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Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The constancy of angular momentum can also be used to derive Kepler???s second law, which states that the rate at which the radius vector of each mass sweeps out area is a constant.
http://www.w3.org/ns/prov#wasQuotedFrom	physicspages.com