What does “Root-mean-square speed” actually mean in Kinetic Theory of Gases, and why does it matter for JEE?
The rms speed is the square root of the mean of v^2, not the ordinary mean speed. It links the molecular picture to measurable pressure and temperature.
In simple words: The rms speed is the square root of the mean of v^2, not the ordinary mean speed. It links the molecular picture to measurable pressure and temperature. Getting Root-mean-square speed clear matters because JEE questions on Kinetic Theory of Gases usually test this idea directly, not just a formula you memorised.
Key point
Root-mean-square speed
Common mistake
using Celsius temperature in the rms-speed formula.
Memory tip
molecular-speed formulas always need kelvin.
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