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: Converting to kg ? simple question

  1. Feb 8, 2010 #1
    1. The problem statement, all variables and given/known data
    how do i convert 938.3MeV/(c^2) to kilo grams
    3. The attempt at a solution

    so this is mega electron volts divided by c^2 do i just divide it by 1.602*10^(-19) joules
    is e measured in coulombs and a volt is a joule per coulomb.
  2. jcsd
  3. Feb 8, 2010 #2
    The eV is a measure of energy, equalling somewhere about 1.6 * 10^(-19) J
    1 J = 1 kg * m^2/s^2
    I assume c wants to be the speed of the light, which is given in m/s

    so 1 eV/c^2= (some scalar) * kg * m^2/s^2 / (m/s)^2
    now what you get by simplifying?

    It always helps not to forget to write the units, and go for base units when in doubt.
  4. Feb 8, 2010 #3
    thanks , ok i see , so i multiply it by 1.602*10^(-19)J/1eV to get it Kg .
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook