A period can be gravitational.Logical formLearned from2 sentences. A (test particle) can be in a gravitational field.Logical formLearned from2 sentences. A gravitational field may propagate as a gravitational wave.Logical formLearned from2 sentences. Gravitational waves may be predicted by a general theory of relativity.Logical formLearned from2 sentences. Persons may compare a gravitational force.Logical formLearned from2 sentences. A gravitational force can be on an element.Logical formLearned from2 sentences. Gravitational forces may be removed.Logical formLearned from2 sentences. A gravitational field may be generated by a mass.Logical formLearned from2 sentences. Effects may be associated with a gravitational field.Logical formLearned from2 sentences. Gravitational pull may create amounts of heat.Logical formLearned from2 sentences. A gravitational collapse may pertain-to an airway.Logical formLearned from2 sentences. A scientist may predict a phenomenon of gravitational (time dilation).Logical formLearned from2 sentences. A description may pertain-to a gravitational force.Logical formLearned from2 sentences. An imbalance can be gravitational.Logical formLearned from2 sentences. A frame can be gravitational.Logical formLearned from2 sentences.