Question: What does the term \'mean free path\' refer to in the context of gases?

Options:

1. The average distance traveled by a molecule between collisions
2. The average speed of gas molecules
3. The average time between collisions
4. The average kinetic energy of gas molecules

Correct Answer: The average distance traveled by a molecule between collisions

Solution:

The mean free path is defined as the average distance a molecule travels before colliding with another molecule.