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The energy equivalent of a mass m at rest is:
ByAdmin9. Question 9 The energy equivalent of a mass m at rest is: 1 point E = mc E = mc2 E = mv2/2 E = mv2
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 is in units of years. Which of the following spacetime points have a lightlike interval with Alice’s spacetime position? (Mark all that are correct.)
ByAdmin7. Question 7 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…
Consider person #1 moving to the right (positive x direction) at a constant velocity v with respect to person #2. Assume that at time t = 0 the two were side by side. Each person measures distances using the same units (such as meters), and each person uses their own location as the origin for their measuring system. Let the measurements of person #1 be represented by x1 and the measurements of person #2 be represented by x2. Consider an event that happens at some position x1 and time t (after time t = 0), according to person #1. Person #2 measures the location of this event at position x2. Would the value of x2 be greater than or less than x1?
ByAdmin3. Question 3 Consider person #1 moving to the right (positive x direction) at a constant velocity v with respect to person #2. Assume that at time t = 0…
In the lecture on “Spaceships on a rope,” the reason that the rope breaks according to the perspective of the stationary observer (A) is:
ByAdmin5. Question 5 In the lecture on “Spaceships on a rope,” the reason that the rope breaks according to the perspective of the stationary observer (A) is: 1 point …
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 that Alice’s pole will fit completely inside as she goes through the barn. Why does he think this?
ByAdmin4. 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…
Which world line represents an object moving to the right along the x axis and slowing down (decelerating)?
ByAdmin10. Question 10 Which world line represents an object moving to the right along the x axis and slowing down (decelerating)? 1 point