Q.

If four molecules of a gas have speed 2, 4, 6, 8 kms-1 respectively, then root mean square speed (in kms-1) will be .. and respectively.

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answer is 5.48.

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Detailed Solution

Here, c1=2kms−1;c2=4kms−1          c3=6kms−1 and c4=8kms−1,                Root mean square speed,                  c=c12+c22+c32+c424=22+42+62+824=5.48kms−1
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If four molecules of a gas have speed 2, 4, 6, 8 kms-1 respectively, then root mean square speed (in kms-1) will be .. and respectively.