Answer
Please see the work below.
Work Step by Step
We know that the air molecules in a room move in random directions, so the average velocity of air molecules in the room is zero (although their speed is not zero).
Physics Technology Update (4th Edition)
by Walker, James S.
Published by
Pearson
ISBN 10:
0-32190-308-0
ISBN 13:
978-0-32190-308-2
Chapter 17 - Phases and Phase Changes - Conceptual Questions - Page 603: 3
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