If the root mean square velocity of the particles in a gas is 450 m/s, and a particle collides with another particle every 2.0 × 10-9 seconds on average, then the mean free path is.
a. 6.0x10^-7 m.
b. 7.5x10^-7 m.
c.6.9x10^-7 m.
d. 9.0x10^-7m.
e. 85x10^-7 m.
Mean free path is the distance travelled by the particle before the collision .
Given, the collision time is 2.0 x 10-9 s.
And the rms velocity of the gas-particle is 450 m/s.
So, the mean free path of the gas-particle is
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