At what temperature will the $rms$ speed of oxygen molecules become just sufficient for escaping from the Earth's atmosphere $?$ (Given: Mass of oxygen molecule $(m)= 2.76 \times 10^{-26}\,kg$ Boltzmann's constant $k_B= 1.38 \times 10^{-23}\,\, JK^{-1}$)
NEET 2018, Medium
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