1. Question 1 On a spacetime diagram with time in years and x in light years, what is the slope of a world line of a faster-than-light object that is…
4. Question 4 In the “pole in the barn” example done in lecture, even though Alice’s pole is 10 meters long, and Bob’s barn is 8 meters long, Bob thinks…
8. Question 8 In the “pole in the barn” example done in lecture, how can Bob observe/photograph the front of the pole to be located at the rear door of…
6. Question 6 For an object that is moving to the right (positive x direction), under what circumstances can we get a reversal of cause and effect? 1 point …
3. Question 3 Consider the twin paradox example done in lecture: On Alice’s outbound trip to the star, Bob observes Alice’s clocks running slower than his clocks. What does Alice…
8. Question 8 If the spaceship in the “faster than light?” example travels from San Francisco to St. Louis at a speed of 0.99c, how fast does the ship appear…
6. Question 6 Consider a spacetime diagram for Alice’s frame of reference (so Alice is positioned at x = 0) where x is in units of light years and t…
4. Question 4 Bob is moving to the right (positive x direction) in his spaceship at a velocity v, and Alice is observing him. If we want to draw Bob’s…
1. Question 1 For a spacetime diagram with the vertical axis representing time and the horizontal axis representing location, what are the lines of simultaneity? 1 point Any diagonal…
9. Question 9 In the “good guys vs. bad guys” example done in lecture, the bad guys invented a super ship and launched it 4 years after the good guys…
