1. The problem statement, all variables and given/known data A clock moves along the x axis at a speed of 0.590c and reads zero as it passes the origin. What time does the clock read as it passes x = 180 m? 2. Relevant equations I believe that this is some sort of basic Lorentz Transformation, but I have just started learning about relativity so I might be wrong. [tex]\Delta x' = \gamma(\Delta x - v\Delta t)[/tex] [tex]\Delta t' = \gamma(\Delta t - v\Delta x/c^2)[/tex] 3. The attempt at a solution I started by putting these variables into the second equation x= 180m v= .590c t= 0s [tex]\gamma [/tex]=1.269 [tex]\Delta t' = \gamma(\Delta t - v\Delta x/c^2)[/tex] [tex]\Delta t' = 1.269(0 - (180m)(.590c)/c^2)[/tex] This gave me -4.49537e-7 secs which was wrong. I'm most confused on what conditions are used to determine whether given variables are regular or prime (').