Posted by **Chris** on Saturday, January 6, 2007 at 9:23pm.

Is average speed (u) the same as root mean square velocity? I found a formula for root mean square velocity which I know is also used for average speed:

(3RT/MM)^1/2

Is that right?

I don't know what that is supposed to be an average OF, but is all likelihood it is a root mean square. The mean or average speed is not the same.

Are you sure you did not mean to write

[3 R T/ M ]^(1/2) ?

That is the room mean square speed of an ideal gas. M is the molar mass of the molecule.

Yes, that's what I meant. My book denotes molar mass as MM. Thank you

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