For a sample of gas \( \mathrm{X} \) shown in Fig. 3.47, the rms velocity at temperature \( T \)...

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For a sample of gas \( \mathrm{X} \) shown in Fig. 3.47, the rms velocity at temperature \( T \) will be
(A) \( 328 \mathrm{~m} \mathrm{~s}^{-1} \)
(B) \( \sqrt{\frac{3 \pi}{8}} \times 400 \mathrm{~m} \mathrm{~s}^{-1} \)
(C) \( 490 \mathrm{~m} \mathrm{~s}^{-1} \)
(D) \( 400 \mathrm{~m} \mathrm{~s}^{-1} \)
Figure \( 3.47 \)
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