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  4. Four particles have speed 2,3,4 and 5 cm/s respectively. Their rms speed is

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Q. Four particles have speed $2,3,4$ and $5$ cm/s respectively. Their rms speed is

States of Matter

Solution:

$u_{\text {ms }}=\sqrt{\left[\frac{2^{2}+3^{2}+4^{2}+5^{2}}{4}\right]}$

$=\sqrt{\left[\frac{54}{4}\right]} cm s ^{-1}$