1. The problem statement, all variables and given/known data Two events occur in an inertial system K as follows. Event 1: x1 = a, t1 = 2a/c, y1 = 0, z1 = 0 Event 2: x2 = 2.6a, t2 = 1.9a/c, y2 = 0, z2 = 0 What is the velocity of the frame K' in which these events appear to occur at the same time? Express the velocity vector using the variables a and c and the unit vectors, i, j, and k; for example, 2*i + 2*j is a vector which bisects the x and y axes. 2. Relevant equations Lorentz equations 3. The attempt at a solution First I assumed that I could use the time dilation, T0=T/Ɣ with T (the observed time) being zero but that obviously will not work. I likewise tried it with length contraction. I dont know where else to go from here.