What is rms velocity ?
It is defined as the square root of mean of the squares of velocities of individual molecules.
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Brownian motion.
Brownian motion was first observed in 1827 by brown, a botanist.The phenomenon of Brownian movement can be easily observed in a laboratory if a colloidal solution is examined under an ultramicroscope.The non-stop random and haphazard(badly organized) motion of the particles in a medium is called Brownian motion.
Equipartition of energy.
In any dynamical system, in thermol equilibrium, the total kinetic energy of the system is equally divided among all it's degrees of freedom & the kinetic energy per molecule per degree of freedom is equal to 1/2 KT, this is called equipartition of energy.
Dalton's law of partial pressure.
Answer:- According to the kinetic theory of gases (which do not combine chemically) contains molecules of both gases which hit the walls of the vessel.The pressure of the gas is due to the bombardment of the molecules on the walls per unit area.Since the molecules do not exert any force of attraction on one another,the pressure exerted will be due to the hits of the molecules of each gas per unit area and total pressure will be the sum of these partial pressures.This is Dalton's law of partial pressure.