Subject	half life
Predicate	be used
Object	to determined the amount of radioisotope
Modality	Modality Occurrences
Polarity	POSITIVE
Plausibility	0.2654
Neighborhood Sigma	0.2654
Local Sigma	1.0000
Example Sentences	Sentence Occurrences Source half life is used to determined the amount of radioisotope remaining at a given time 1 Answers.com Questions