The average speed of all the molecules in a gas at a given instant is not zero

PHYSICS · Subjective · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics

Problem

The average speed of all the molecules in a gas at a given instant is not zero, whereas the average velocity of all the molecules is zero. Explain why.

Related theory

Kinetic Theory of Gases
Kinetic theory of pressure
Kinetic theory of an ideal gas
Kinetic Theory

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