1. The problem statement, all variables and given/known data So here's the question An electron is confined within a region of width 1 X 10^-10 meters. Estimate the uncertainty in the x component of the electrons momentum 2. Relevant equations ΔPΔx[itex]\geq[/itex](1/2)(h/2pi) 3. The attempt at a solution The problem appears pretty straight forward. But my teacher has the solution as using the equation ΔPΔx[itex]\geq[/itex]h/2pi So I'm lost as to why he got rid of the one half. I looked at the problem thinking, oh this is simple, and then after seeing that he did that I literally have no idea where to start. Can someone explain?