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How do you estimate the mass of a nucleus?

  1. Feb 7, 2009 #1
    1. The problem statement, all variables and given/known data
    Estimate the mass of a nucleus with a radius of 2.80 * 10^-15m.


    2. Relevant equations
    I do not know if there is an 'equation' for this.


    3. The attempt at a solution
    The answer is 2.11*10^-26.. but I don't even know how to approach this question.
     
  2. jcsd
  3. Feb 7, 2009 #2

    LowlyPion

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    Homework Helper

    I'd start with the radius of a proton - .857 fm (femtometer) and its mass 1.67*10-27 kg then figure the volume of the 2.8 fm volume they want you to fill.

    http://en.wikipedia.org/wiki/Proton
     
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