Calculate the rms speed of smoke particles of mass `5 xx 10^(-17) kg` in their Brownian motion in air at NTP. Given `k_(B) = 1.38 xx 10^(-23) J//K`

Explanation

`v_(rms) = sqrt((3 R T)/(m)) = sqrt((3 xx 1.38 xx 10^(-23) xx 273)/(5 xx 10^(-17)))`
`= 1.5 xx10^(-2) m//s`