Question: According to Adam, the even P occurred at the point (50.0m,0,0), and the event Q occurred at the point (150.0m,0,0) at the same time. Barbara is moving past at 0.8c in the positive x direction.
Part A: According to Barbara, which event occurred first, and what was the time interval between them?
Having trouble with this physics question, can you please explain with the answer.