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Solve these following problems:

Problem: A spacecraft with circular (north and south sides) of diameter 325.0 m passes Earth moving eastward (in relation to you), at the speed of an electron whose kinetic energy is eleven times its rest energy.

Part A. Determine the speed of the spacecraft in units of c, the speed of light in vacuum?

Part B. What are the dimensions of the circular faces according to the earthbound observer?

Part C. According to this earthbound observer, what is lifetime od a copper-64 nucleus on the captain's worktable, in the spacecraft if a copper-64 nucleus at rest has a lifetime of 12.7 h?

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