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Question
The average particle energy needed to observe unification of forces is estimated to be $10^{19} \textrm{ GeV}$. (a) What is the rest mass in kilograms of a particle that has a rest mass of $10^{19} \textrm{ GeV/c}^2$ ? (b) How many times the mass of a hydrogen atom is this?
1. $2\times 10^{-8} \textrm{ kg}$
2. $1\times 10^{19}$ times the mass of a hydrogen atom.
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