( ( An ( ultrasound head ) ) ( ( ( converts ( electrical energy ) ) ( to ( ( kinetic energy ) ( in ( ( the form ) ( of ( sound waves ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT An) (NN ultrasound) (NN head)) (VP (VBZ converts) (NP (JJ electrical) (NN energy)) (PP (TO to) (NP (NP (JJ kinetic) (NN energy)) (PP (IN in) (NP (NP (DT the) (NN form)) (PP (IN of) (NP (JJ sound) (NNS waves)))))))) (. .)))
An ultrasound head converts electrical energy to kinetic energy in the form of sound waves.
(ROOT (S (NP (NNP Electric) (NNS motors)) (VP (VB transform) (NP (JJ electrical) (NN energy)) (PP (IN into) (NP (JJ kinetic) (NN energy)))) (. .)))
Electric motors transform electrical energy into kinetic energy.