root-mean-square speed

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root-mean-square speed

physics

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gaseous collisions

In gas: Pressure
…in terms of the so-called root-mean-square speed v_rms. The v_rms is the square root of the average of the squares of the speeds of the molecules: (v²)^1/2. From equation (19) the v_rms is (3RT/M)^1/2. At 20° C the value for air (M = 29) is 502
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