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Test: GRE Subject Test: Physics
1. | At one point in time, two twins are 30 years old. At this time, one of them gets on a rocket and travels at 0.8 c, for what he experiences to be 12 years. How old is the twin that remained on Earth when the traveling twin returns home? |
70 years old
50 years old
42 years old
37 years old
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