Now, here is question The mean-free-path of between molecular col \( \lambda=\frac{1}{4 \pi \sqrt{2}\left(\frac{p}{k_{\mathrm{B}} T}\right) r^{2}} \) the molecular collision

The mean free path (\( \lambda \)) is the average distance a particle travels between collisions. The formula for it is \( \lambda = \frac{1}{4 \pi \sqrt{2} \left( \frac{p}{k_{\mathrm{B}} T} \right) r^{2}} \), where \( p \) is pressure, \( k_{\mathrm{B}} \) is the Boltzmann constant, \( T \) is temperature, and \( r \) is the molecular radius. The mean free path is affected by pressure, temperature, and molecular size.