The root mean square speed of the gas molecules is \( \mathrm{P} \)...

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The root mean square speed of the gas molecules is
\( \mathrm{P} \) \( 300 \mathrm{~m} / \mathrm{s} \). What will be the root mean square speed

W. of the molecules if the atomic weight is doubled and absolute temperature is halved?
(1) \( 300 \mathrm{~m} / \mathrm{s} \)
(2) \( 200 \mathrm{~m} / \mathrm{s} \)
(3) \( 150 \mathrm{~m} / \mathrm{s} \)
(4) \( 100 \mathrm{~m} / \mathrm{s} \)
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