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प्रश्न
What is the reason for the Brownian motion?
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उत्तर
According to kinetic theory, any particle suspended in a liquid or gas is continuously bombarded from all directions so that the mean free path is almost negligible. This leads to the motion of the particles in a random and zig-zag manner.
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संबंधित प्रश्न
Choose the correct option.
The mean free path λ of molecules is given by where n is the number of molecules per unit volume and d is the diameter of the molecules.
If the temperature and pressure of a gas is doubled the mean free path of the gas molecules ____________.
Define mean free path and write down its expression.
List the factors affecting the mean free path.
Derive the expression for the mean free path of the gas.
Calculate the mean free path of air molecules at STP. The diameter of N2 and O2 is about 3 × 10−10 m
Mean free path of molecules of a gas is inversely proportional to ______.
Calculate the ratio of the mean free paths of the molecules of two gases having molecular diameters 1 A and 2 A. The gases may be considered under identical conditions of temperature, pressure and volume.
Ten small planes are flying at a speed of 150 km/h in total darkness in an air space that is 20 × 20 × 1.5 km3 in volume. You are in one of the planes, flying at random within this space with no way of knowing where the other planes are. On the average about how long a time will elapse between near collision with your plane. Assume for this rough computation that a saftey region around the plane can be approximated by a sphere of radius 10 m.
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 ______.
