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Physics, 22.06.2019 19:00
According to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does maria's voyage take according to samir?
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Physics, 23.06.2019 01:00
2. circled insects have mutations, or changes to their dna. how many of the offspring insects in this generation have mutations?
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How does physical change affect the identity of a substance...
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