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The value closest to the thermal velocit...

The value closest to the thermal velocity of a helium atom at room temperature (300 K) in `ms^(-1) is :[ k_(B)=1.4xx10^(-23) j//k, m_(He)=7xx10^(-27) kg]`

A

`1.3 xx10^4`

B

`1.3 xx10^2`

C

`1.3 xx10^5`

D

`1.3 xx10^2`

Text Solution

Verified by Experts

The correct Answer is:
B
`v=sqrt((3k_(B)T)/(m_(He)))= sqrt((3xx1.4xx10^(-23)xx300)/(7xx10^(-27))= 1.3xx10^(3)m"/"s`.
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