https://k3rrr.com/wp-content/uploads/2018/08/K3RRR-new-logo-K3RRR-K3TripleR-1030x464.png00https://k3rrr.com/wp-content/uploads/2018/08/K3RRR-new-logo-K3RRR-K3TripleR-1030x464.png2013-11-28 19:00:132013-11-28 19:00:137.2.7.1 Identifying and counting nodes in a standing wave