1. Limited time only! Sign up for a free 30min personal 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!

Homework Help: Physics units help

  1. Sep 6, 2010 #1
    1. The problem statement, all variables and given/known data

    I am told that 1 (E)1/2 = 9.045Å-1, where E is the energy in meV. How do I find out what 1 meV is in Å from that? All I can get is the correspondence between meV and Å-2, not meV and Å.
  2. jcsd
  3. Sep 6, 2010 #2


    User Avatar
    Homework Helper

    Re: Units

    What does the Å represent?
    Do the 1 and 9.045 have units?
    Maybe your job is just to solve the equation for Å, and put in 1 MeV for E. Not a clear question in my opinion - if you have posted all of it. Normally the 1 MeV would be changed into standard units of energy (Joules) but I don't know what you should do in this case.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook