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Travel to the Stars. Suppose you stay home on earth while your twin siter takes a trip to a distant star and back in a spaceship. Both of you are 25 years old when leave and your are 45 years onld when she returns.

a) her space ship travels 1% of the speed of light. How old is your sister when she gets back?

b)suppose instead that her spaceship travels 99% of the speed of light. How old is your sister when she gets back?

c)Comment on your answer for b) and c).

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