Physics - Heat & Thermo Question with Solution | TestHub

The temperature, at which the root mean square velocity of hydrogen molecules equals their escape their escape velocity from the earth, is closest to:
$[$Boltzmann Constant${\mathrm{k}}_{\mathrm{B}}=1.38\times {10}^{-23}\mathrm{ }\mathrm{J}/\mathrm{K}$
Avogadro number${\mathrm{N}}_{\mathrm{A}}=6.02\times {10}^{26}\mathrm{ }/\mathrm{k}\mathrm{g}$
Radius of Earth:$6.4\times {10}^6 \mathrm{m}$
Gravitational acceleration on Earth$=10\mathrm{ }\mathrm{m}{\mathrm{s}}^{-2}]$