Year: 2020
Topic: Kinetic Theory
Time :
1.
The mean free path l for a gas,with molecular diameter d and number density n can be expressed as
(1). \(\displaystyle \frac{1}{\sqrt{2}n\pi d^2}\)
(2). \(\displaystyle \frac{1}{\sqrt{2}n^2\pi d^2}\)
(3). \(\displaystyle \frac{1}{\sqrt{2}n^2\pi^2 d^2}\)
(4). \(\displaystyle \frac{1}{\sqrt{2}n\pi d}\)