The rms speed of an ideal gas is vrms = √3RTM and the kinetic energy is Ek=32RT. From this, it is concluded that the speed is mass dependent, while the kinetic energy isn't.
This doesn't make sense to me. I know the speed and kinetic energy for things other than ideal gases are surely mass dependent. The heavier an object is, the slower it is and will have a bigger kinetic energy. Why isn't this true for ideal gases?
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