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If speeds of the four molecules of an id...

If speeds of the four molecules of an ideal gas are v, 3v, 5v and 7v respectively, then the mean square speed of the molecules will be

A

`4 v^2`

B

`2 sqrt(v)`

C

`21 v^2`

D

`sqrt(21) v`

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AAKASH INSTITUTE ENGLISH-MOCK TEST 7-Exercise
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