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A gaseous mixture contains 4 molecules w...

A gaseous mixture contains 4 molecules with a velocity of 6 cm `sec^(-1)` , 5 molecules with a velocity of 2 cm `sec^(-1)` and 10 molecules with a velocity of 3 cm `sec^(-1)` . What is the RMS velocity of the gas :

A

2.5 cm `sec^(-1)`

B

1.9 cm `sec^(-1)`

C

3.6 cm `sec^(-1)`

D

4.6 cm `sec^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
c
(c) `U_("ms")=sqrt((4xx(6)^(2)+5(2)^(2)+10(3)^(2))/(19)`
`=3.6cm//sec.`
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