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Physics, 05.09.2019 20:20 bear342

Astarship voyages to a distant planet 10 ly away. the explorers stay 3.0 yr , return at the same speed, and arrive back on earth 26 yr after they left. assume that the time needed to accelerate and decelerate is negligible. a what is the speed of the starship? b. how much time has elapsed on the astronauts' chronometers? answer in years.

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