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Kinetic Energy and Velocity

  1. Jun 7, 2007 #1
    1. The problem statement, all variables and given/known data
    A molecule has mass 5.3 x 10^-26 Kg and KE 6.24 x10^-21. What is the velocity in m/s?

    2. Relevant equations
    KE = mv^2 / 2

    3. The attempt at a solution
    I plug the numbers into the equation and get an answer of 15.34, but the correct answer is 48.6 m/s. Is this the wrong equation?
  2. jcsd
  3. Jun 7, 2007 #2
  4. Jun 7, 2007 #3
    check ur units. thats the correct equation to use
    and I get 485 too
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