# Energy unit to kelvin, seconds, density, length

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1. Sep 29, 2015

### June_cosmo

1. The problem statement, all variables and given/known data
Convert 1 $Gev$ to Kelvin, and convert $GeV^{-1}$ to meters, seconds, and convert $GeV^4$ to density $(kg/ m^3).$

2. Relevant equations
natural units $c=h=k_B=1$

3. The attempt at a solution
I know to convert energy to meters, I can use
$\lambda =hc/E$, I get the result $GeV^{-1}=8.05*10^{14}m$
But I don't know what other formulas I should use in order to complete the other conversions. Thanks for any hint!

2. Oct 4, 2015

### OmCheeto

Wiki's entry on the "electron volt" lists all the conversion factors except for the density.