| The value closest to the thermal velocity of a Helium atom at room temperature \[(300K)\] in \[m{{s}^{-1}}\] is: [JEE Online 15-04-2018 (II)] |
| \[\left[ {{k}_{B}}=1.4\times {{10}^{-23}}J/K;{{m}_{He}}=7\times {{10}^{-27}}kg \right]\] |
A) \[1.3\times {{10}^{4}}\]
B) \[1.3\times {{10}^{5}}\]
C) \[1.3\times {{10}^{2}}\]
D) \[1.3\times {{10}^{3}}\]
Correct Answer: A
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