1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    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!

Uncertainty Principle and minimum kinetic energy

  1. Dec 8, 2009 #1
    An atom represents a region about 1.7 10-10 m wide in which an electron is confined. Use the Heisenberg uncertainty principle to estimate the minimum kinetic energy of the electron, expressing your result in electron-volts (eV).

    So I got the problem right when I analyzed the atom as a 1 d region. How will this change if it is a 3d region? I found minimum momentum=h/[tex]\Delta[/tex]x
    and then used the equations KE=p^2/2m...
  2. jcsd
  3. Dec 8, 2009 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper

    Can you write p2 in terms of px, py, and pz?
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook