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At constant pressure, calculate the root...

At constant pressure, calculate the root mean square velocity of a gas molecule at temperature `27^(@)C` if its rms speed at `0^(@)C` is 4km/s

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The correct Answer is:
`((V_(rms))_(1))/((V_(rms))_(2))=sqrt((T_(1))/(T_(2)))`.
`4.19km//s`
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