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A ship flies at 0.82c and is observed by ground-based radar to be 55m in length. What is the ship's proper length? a) 96 m

A ship flies at 0.82c and is observed by ground-based radar to be 55m in length. What is the ship's proper length?

a) 96 m

b) 73 m

c) 45 m

d) 43m

e) 31 m

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