Question: In frame S, event B occurs 2 ms after event A, which occurs at Dx = 1.5 km from event A. How fast must an

In frame S, event B occurs 2 ms after event A, which occurs at Dx = 1.5 km from event A. How fast must an observer be moving along the +x axis so that events A and B occur simultaneously? Is it possible for event B to precede event A for some observer?

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