( ( a -RRB- ) ( ( ( Know and ) ( understand ( that ( ( ( ( energy ( can ( be ( ( ( ( ( ( ( ( ( transferred usefully ) ( from ( one form ) ) ) ( to another ) ) , ) or ) stored ) , ) or ) dissipated ) ) ) ) , ) but ) ( energy ( ( can not ) ( be ( ( created or ) destroyed ) ) ) ) ) ) ) ) . ) )
(ROOT (S (LST (LS a) (-RRB- -RRB-)) (VP (VP (VB Know)) (CC and) (VP (VB understand) (SBAR (IN that) (S (S (NP (NN energy)) (VP (MD can) (VP (VB be) (VP (VP (VBN transferred) (ADVP (RB usefully)) (PP (IN from) (NP (CD one) (NN form))) (PP (TO to) (NP (DT another)))) (, ,) (CC or) (VP (VBN stored)) (, ,) (CC or) (VP (VBN dissipated)))))) (, ,) (CC but) (S (NP (NN energy)) (VP (MD can) (RB not) (VP (VB be) (VP (VBN created) (CC or) (VBN destroyed))))))))) (. .)))
a) Know and understand that energy can be transferred   usefully from one form to another, or stored, or dissipated, but energy cannot be created or destroyed.
(ROOT (S (NP (NNP Energy) (PRP it)) (VP (MD can) (RB not) (VP (VB be) (VP (VBN destroyed)))) (. .)))