Five grams of Helium having rms speed of molecules as 1000 m/s and 24 g of oxygen having rms speed of 1000 m/s are introduced into a thermally isolated vessel. The ratio of rms speeds of Helium and oxygen when thermal equilibrium is attained is . Find N. Neglect the heat capacity of the vessel.
For Helium,
For Oxygen,
By internal energy conservation,
We know,
So,
This gives
After mixing, RMS speed of Helium is
For Oxygen,
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