An alien spaceship has a mass ofm= 3.2×109kg, and according to the crew, onboard the bow-to-stern length is l0= 680 m. The ship passes by a space station at relativistic speed, and the technicians on the space station measure the length of the ship to bel= 550 m. What is the kinetic energy of the spaceship at this moment? (Hint: you don’t need to solve for the ship's speed in this problem. You only need to work in terms of γ.)

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