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A ladder 5.20 m long leans against a wall inside a spaceship. From the point of...

A ladder 5.20 m long leans against a wall inside a spaceship. From the point of view of a person on the ship, the top of the ladder is 4.56 m above the floor. The spaceship moves past the Earth with a speed of 0.83c in a direction parallel to the floor of the ship. What is the length of the ladder as seen by an observer on Earth?

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