If a gas contains only three molecules that move with velocities of \( 100,200,500 \mathrm{~ms}^...

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If a gas contains only three molecules that move with velocities of \( 100,200,500 \mathrm{~ms}^{-1} \). What is the rms velocity of that gas in
(1) \( 100 \frac{\sqrt{8}}{3} \)
(2) \( 100 \sqrt{30} \)
(3) \( 100 \sqrt{10} \)
(4) \( \frac{800}{3} \)
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