If Alice travels to the center of the galaxy at a speed very close to the speed of light, what would she see with her eyes (assuming she looked out in her direction of travel)?
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Consider Bob on Space Station Omega in deep space. At time t = 0, both Alice and Kris fly by Bob heading to the right at the same velocity, with Alice in the lead. (Alice passes by Bob at t = 0, with Kris slightly behind her.) Which diagram represents the world lines of Alice and Kris in Bob’s frame of reference?
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Suppose you conduct a survey of people and ask them various questions about their current health status and their home environment. Which of the following is an example of a descriptive question that can be answered by these data?
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