For molecules of an ideal gas,which of the fo | vedclass

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(B) In an ideal gas,the velocity vectors of molecules are distributed randomly in all directions.Due to this symmetry,the average velocity vector $\ve

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(B) In an ideal gas,the velocity vectors of molecules are distributed randomly in all directions.Due to this symmetry,the average velocity vector $\vec{v}$ is zero,i.e.,$\langle \vec{v} \rangle = 0$.Similarly,for any odd power of velocity,such as $\langle v^3 \rangle$ or $\langle v^5 \rangle$,the average value is zero because the positive and negative components cancel each other out.However,for even powers of velocity,such as $\langle v^2 \rangle$ or $\langle v^4 \rangle$,the values are always positive because the square or fourth power of any velocity component is non-negative.Therefore,$\langle v^4 \rangle$ will not be zero.

For molecules of an ideal gas,which of the following average velocities will not be zero?

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