Suppose an attractive nuclear force acts between two protons which may be written as \( F=C e^{-...

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Suppose an attractive nuclear force acts between two protons which may be written as \( F=C e^{-k r} / r^{2} \). (a) Write down the dimensional formulae and appropriate SI units of \( C \) and \( k \). (b) Suppose that \( k=1 \) fermi \( ^{-1} \) and that the repulsive electric force between the protons is just balanced by the attractive nuclear force when the separation is 5 fermi. Find the value of \( C \).
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