Answer:
The r. m. s. speed of the molecules of a gas is defined as the square root of the mean of the squared velocities of the molecules of a gas. No, r. m. s. speed is different from the average speed. For example, \[{{\upsilon }_{rms}}=\frac{\sqrt{\upsilon _{1}^{2}+\upsilon _{2}^{2}+\upsilon _{3}^{2}}}{3}\] and \[\overline{\upsilon }=\frac{{{\upsilon }_{1}}+{{\upsilon }_{2}}+{{\upsilon }_{3}}}{3}.\]
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