The rms velocity of a gas molecule is \( 300 \mathrm{~ms}^{-1} \). The rms velocity of the molec...

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The rms velocity of a gas molecule is \( 300 \mathrm{~ms}^{-1} \). The rms velocity of the molecules of gas with twice the molecular weight and half the absolute temperature, is
(a) \( 300 \mathrm{~ms}^{-1} \)
(b) \( 600 \mathrm{~ms}^{-1} \)
(c) \( 75 \mathrm{~ms}^{-1} \)
(d) \( 150 \mathrm{~ms}^{-1} \)
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