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← ScienceWhich outcome occurs when a spacecraft's engines operate continuously, closely approaching the threshold imparted by the Equivalence Principle?
A)Constant proper acceleration and gravity✓
B)Constant spacetime curvature increase only
C)Inertial mass matches gravitational mass
D)Decreasing proper acceleration in vacuum
💡 Explanation
A continuous thrust simulates a gravitational field via the Equivalence Principle. Because proper acceleration remains constant relative to the spacecraft, Earthbound observers measure decreasing acceleration over time; therefore constant proper acceleration rather than fluctuating or constant curvature develops due to inertia.
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