what is R.M.S velocity ???????/
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All gas particles move with random speed and direction.By solving for the average velocity of the gas particles, you effectively get an average velocity of zero, assuming that all particles are moving equally in different directions.By taking the root of the square of the average velocities, you can acquire the average speed of gaseous particles.The root-mean-square speed takes into account both molecular weight and temperature, two factors that directly affect the kinetic energy of a material
Take the square root of the average that you found before.The result is the root-mean-square (rms) velocity