Two spaceships, each 100 m long when measured at rest, travel toward each other with speeds of 0.85c relative to Earth. • How long is each ship as measured by someone on Earth? • How fast is each ship traveling as measured by an observer on the other? • How long is one ship when measured by an observer on the other? • At time t0 on Earth, the fronts of the ships are together as they just begin to pass each other. At what time on Earth are their ends together?

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