Why Is the Average Velocity of Gas Molecules Zero?

shamone
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Homework Statement



Why is <vx> = 0 this is a gas molecule

Homework Equations





The Attempt at a Solution



I don't understand how the velocity could ever be zero?
 
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The average velocity of these particles is zero, because each particle is equally likely to have a positive or negative velocity in any direction.

Actually I think this is the reason
 

Thread 'Modeling a graph that shows age in relation to depth of an ice sample'

To solve this, I first used the units to work out that a= m* a/m, i.e. t=z/λ. This would allow you to determine the time duration within an interval section by section and then add this to the previous ones to obtain the age of the respective layer. However, this would require a constant thickness per year for each interval. However, since this is most likely not the case, my next consideration was that the age must be the integral of a 1/λ(z) function, which I cannot model.
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