STEM Lessons for College Students

An extraterrestrial spaceship is moving away from the earth after an

An extraterrestrial spaceship is moving away from the earth after an unpleasant encounter with its inhabitants. As it departs, the spaceship fires a missile toward the earth. An observer on earth measures that the spaceship is moving away with a speed of 0.585c . An observer in the spaceship measures that the missile is moving away from him at a speed of 0.800c

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