2. Twin sisters, Anna and Zelma, are twenty years old. Anna stays on the Earth while Zelma gets on a20.0-meter-long spaceship that travels at constant speed 0.98c to a distant star. The star is 9.00lightyears away as measured by Anna. Zelma immediately turns around and travels back to the Earth atthe same speed of 0.98c.a) What length does Anna measure for the spaceship while it is moving?b) Upon Zelma's return, which twin is seen to be older now on Earth and what is the age difference?

Given: Anna and Zelma are 20 years old. The rest length of the spaceship is 20 m. The speed of the…

Answered: 2. Twin sisters, Anna and Zelma, are…

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