Kinetic Theory of Gases — Physics STD 11 — Question
Tamilnadu BoardEnglish MediumSTD 11PhysicsKinetic Theory of Gases2 Marks
Question
Define root mean square speed $\left( v _{ rms }\right)$. Write down its equations.
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Answer
Root mean square speed is defined as the square root of the mean of the square of speeds of all molecules. It is denoted by $v_{r m s}=\sqrt{v^2}$ Mean square speed $\overline{v^2}=\frac{3 k T }{m}$ $ \therefore \quad v_{r m s}=\sqrt{\frac{3 k T }{m}}=1.73 \sqrt{\frac{k T }{m}} $
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