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Four molecules of gas have speeds 1,2,3 ...

Four molecules of gas have speeds 1,2,3 and 4 `km//s`.The value of the root mean square speed of the gas molecules is

A

`1/2sqrt(15)kms^-1`

B

`1/2sqrt(10)kms^-1`

C

`2.5kms^-1`

D

`sqrt((15)/2)kms^-1`

Text Solution

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The correct Answer is:
D
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