Which describes a relationship based on the general theory of relativity? a. acceleration in space and magnetism on earth have opposite effects on objects. b. acceleration in space and magnetism on earth have the same effects on objects. c. acceleration in space and gravity on earth have opposite effects on objects. d. acceleration in space and gravity on earth have the same effects on objects.

According to Einstein's Theory of Relativity, an object at rest experiences the time differently from an object moving: a moving clock would be slower than a resting clock.
Two objects experiencing the same acceleration, do experience the same time dilation, therefore a person on Earth's surface experiencing a gravitational acceleration of 9.8m/s² will feel the same effects of a person on a spaceship accelerating at 9.8m/s².

Hence, the correct answer is: D) Acceleration in space and gravity on Earth have the same effects on objects.

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