( ( The equation ) ( ( is ( known ( as ( the ( impulse-momentum ( change equation ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN equation)) (VP (VBZ is) (VP (VBN known) (PP (IN as) (NP (DT the) (JJ impulse-momentum) (NN change) (NN equation))))) (. .)))
The equation is known as the impulse-momentum change equation .
(ROOT (S (NP (NP (NNP Change)) (PP (IN in) (NP (NP (NN momentum)) (PP (IN in) (NP (DT an) (NN object)))))) (VP (VBZ is) (ADJP (JJ equivalent) (PP (TO to) (NP (NN impulse))))) (. .)))