1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Electron Momentum

  1. Nov 17, 2009 #1
    1. The problem statement, all variables and given/known data

    Find the uncertainty in the momentum(in kg x m/s) of an electron if the uncertainty in its position is equal to 3.4x10-10m, the circumference of the first Bohr Orbit.

    2. Relevant equations

    n[tex]\lambda[/tex]=2r

    [tex]\lambda[/tex]= h/mv

    mvr= nh/2[tex]\pi[/tex]

    3. The attempt at a solution

    3.4x10-10=2 pi r
    r= 5.41x10-11m

    [tex]\lambda[/tex]=h/mv
    v=2.141x106m/s

    mvr=nh/2 pi
    m=7.278x10-4J/m2
    --But this answer is not in kg x m/s!
     
    Last edited: Nov 17, 2009
  2. jcsd
  3. Nov 17, 2009 #2

    turin

    User Avatar
    Homework Helper

    You have the wrong relevant equations. Hint: you only need one. Another hint: the problem is almost certainly asking for the minimum uncertainty in momentum.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Electron Momentum
  1. Momentum of electron (Replies: 1)

Loading...