About: http://webisa.webdatacommons.org/417976931

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	If constant flow of water in a pipe is an analogy to DC current, alternating current is like a flow periodically sloshing forward and back, delivering energy but no net water flow.
http://www.w3.org/ns/prov#wasQuotedFrom	nasa.gov