( ( Be ( able ( to ( determine ( ( frequency ( , ( period ( , ( amplitude ( , ( and speed ) ) ) ) ) ) ) ( of ( a wave ) ) ) ) ) ) ) . )
(ROOT (S (VP (VB Be) (ADJP (JJ able) (S (VP (TO to) (VP (VB determine) (NP (NP (NN frequency) (, ,) (NN period) (, ,) (NN amplitude) (, ,) (CC and) (NN speed)) (PP (IN of) (NP (DT a) (NN wave))))))))) (. .)))
Be able to determine frequency, period, amplitude, and speed of a wave.
(ROOT (S (NP (NP (DT The) (NN frequency)) (PP (IN of) (NP (DT a) (NN wave)))) (VP (VBZ is) (NP (NP (DT the) (NN reciprocal)) (PP (IN of) (NP (NP (DT the) (NN period)) (PP (IN of) (NP (DT the) (NN wave))))))) (. .)))