Four standing waves, labeled A through D, are described below. Wave A: first harmonic; pipe closed at one end; length = 1 m Wave B: first harmonic; pipe open at both ends; length = 1 m Wave C: second harmonic; pipe open at both ends; length = 3 m Wave D: second harmonic; pipe closed at one end; length = 3 m Assume second harmonic in both cases means second possible harmonic, that is, next to the first one. Part A Rank the standing waves in order of decreasing frequency. Rank from greatest to smallest. To rank items as equivalent, overlap them. Reset Help Wave A Wave B Wave C Wave D