Simultaneous measurement of the momentum component px

[jdawg]

Homework Statement

The uncertainty in the position of an electron along an x axis is given as 38 pm. What is the least uncertainty in any simultaneous measurement of the momentum component px of this electron?

Homework Equations

Position uncertainty = h/ delta p (delta p is the uncertainty in the momentum)
Delta p = (percentage of speed)*Px

The Attempt at a Solution

I got the momentum uncetainty to be 1.74*10^-23

 

[BvU]

You use $\Delta p \Delta x = h$. From what I remember, there is a more strict relationship that may well be the one they want you to use here...

 

[jdawg]

Thank you!