Suppose a W^- created in a bubble chamber lives for 5.00 x 10^-25 s. What distance does it move in this time if it is traveling at 0.900 c? Since this distance is too short to make a track, the presence of the W^- must be inferred from its decay products. given W^- Note that the time is longer than the lifetime, which can be due to the statistical nature of decay or time dilation.