Question

Four molecules of ags have speeds 1,2,3 and 4 `km//s`.The volue of the root mean square speed of the gas molecules is
A. `1/2sqrt15kms^(-1)`
B. `1/2sqrt10kms^(-1)`
C. `2.5kms^(-1)`
D. `sqrt(15//2)kms^(-1)`

Answer 1

Correct Answer - D
`v_(rms)=sqrt(((1)^(2)+(2)^(2)+(3)^(2)+(4)^(2))/4)=sqrt(15/2)kms^(-1)`