Two Spaceships,each 100 M Long in Its Own Rest Frame,approach

question 64

Multiple Choice

Two spaceships,each 100 m long in its own rest frame,approach Earth from opposite directions,each with a speed 0.50c relative to Earth.As measured by a passenger in one of the spaceships,how long is the other spaceship?

• A)50 m
• B)60 m
• C)70 m
• D)80 m
• E)90 m

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