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!

Revolutions of an electron

  1. Mar 28, 2007 #1
    1. The problem statement, all variables and given/known data

    A hydrogen atom exists in an excited state for typically 5.79 ns. How many revolution would an electron make in the n=2 state before decaying?

    2. Relevant equations
    Ao=.053 nm

    3. The attempt at a solution
    Rn=4*.053=.212 nm (don't know what purpose this serves)
    v= 594.8 m/s
    distance= v*t
    d= 594.8*5.79E-9s= 3.444 E-6 m
    circumfrance- 2*pi*r= 2*3.14*.212E-9m=1.332E-9 m
    d/circumfrance= 2585.5 revolutions

    This is wrong, can someone help me?
  2. jcsd
  3. Mar 28, 2007 #2


    User Avatar
    Science Advisor
    Homework Helper

    You put a wrong value for the mass of the electron. It should be 9.1 E-31 kg.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Revolutions of an electron
  1. Electron capture (Replies: 1)

  2. Electron capture (Replies: 4)