A sample of a gas contains `15` molecules with a speed of `3 m s^(-1), 25` molecules with a speed of `5 m s^(-1)` and

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Q 3183323247.     A sample of a gas contains `15` molecules with
a speed of `3 m s^(-1), 25` molecules with a speed
of `5 m s^(-1)` and `30` molecules with a speed of
`8 m s^(-1)`. Calculate root mean square speed of
these molecules.

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(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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