1. The problem statement, all variables and given/known data An unstable high-energy particle is created in the laboratory, and it moves at a speed of 0.978c. Relative to a stationary reference frame fixed to the laboratory, the particle travels a distance of 1.38x10-3 m before disintegrating. (a) What is the proper distance traveled? (b) What is the distance measured by a hypothetical person traveling with the particle? (c) What is the proper lifetime? (d) What is the dilated lifetime? 2. Relevant equations L0/(gamma)=L (gamma)=1/sqrt(1-(v/c)2) 3. The attempt at a solution Stuck on part A: V=.978c L= 1.38x10-3m L0=? (gamma)=1/sqrt(1-(v/c)2)= 1/sqrt(1-(.978)2)= 4.79 L0=L x (gamma)= (1.38x10-3m)(4.79)= .00662m Did something wrong and cannot figure it out. Please help!