Question

If n is the number density and d is the diameter of the molecule, then the average distance covered by a molecule between two successive collisions (i.e. mean free path) is represented by ______.

Options

• `1/sqrt (2 n pi d^2)`

• `sqrt 2 n pi d`

• `1/(sqrt 2 n pi d)`

• `1/(sqrt 2 n^2 pi^2 d^2)`

Answer 1

If n is the number density and d is the diameter of the molecule, then the average distance covered by a molecule between two successive collisions (i.e. mean free path) is represented by `bbunderline(1/(sqrt 2 n pi d))`.

Explanation:

The average distance between two successive collisions of a molecule is:

λ = `1/(sqrt 2 n pi d)`