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Calculate the root mean square speed of ...

Calculate the root mean square speed of smoking practices of mass `5xx10^(-17)` kg in their Brownian motion in air at S.T.P

A

`1.5 ms^(-1)`

B

`3.0 ms^(-1)`

C

`1.5 cm s^(-1)`

D

`3.0 cm s^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
C
`nu_(rms)=sqrt((3RT)/M)=sqrt((3xx8.3xx273)/(5xx10^(-17)xx6.02xx10^(23)))=15xx10^(-3)ms^(-1)`
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