Four molecules of a gas has speed 2, 4, 6 and 8 kms^(-1)respectively. Calculate their average speed and root mean square speed.

Four molecules of a gas has speed 2, 4, 6 and 8 kms^(-1)respectively.

1.	Four molecules of a gas has speed 2, 4, 6 and 8 kms^(-1)respectively. Calculate their average speed and root mean square speed.
Answer» SOLUTION :AVERAGED SPEED, `barv=(v_1+v_2+v_3+v_4)/4` `=(2+4+6+8)/4=5 KMS^(-1)` Root mean square speed, `v_(rms)=sqrt((v_1^2+v_2^2+v_3^2+v_4^2)/4)` `=sqrt((2^2+4^2+6^2+8^2)/4)` `=sqrt((120)/4)=sqrt30= 5.48kms^(-1)`