A principle of relativity may be extended to gravitational fields.Logical formLearned from2 sentences. An effect may pertain-to a gravitational force.Logical formLearned from2 sentences. Hubs can be gravitational.Logical formLearned from2 sentences. A gravitational pull may pertain-to moons.Logical formLearned from2 sentences. A centrifugal force can be equal to a gravitational force.Logical formLearned from2 sentences. Gravitational pull may diminish with distance.Logical formLearned from2 sentences. Gravitational forces may pertain-to the earth.Logical formLearned from2 sentences. A gravitational energy may be released from a matter.Logical formLearned from2 sentences. A gravitational energy may be converted into a (x-ray light).Logical formLearned from2 sentences. A difference can be in gravitational pull.Logical formLearned from2 sentences. A punch can be gravitational.Logical formLearned from2 sentences. A comet may be captured by a gravitational pull of a planet.Logical formLearned from2 sentences. Gravitational potential energy can be due to a (building material).Logical formLearned from2 sentences. Paths may be determined by a gravitational attraction.Logical formLearned from2 sentences. Exurbs may break free of a gravitational pull of cities.Logical formLearned from2 sentences.