# Which of the following quantities is zero on an average for the molecules of an ideal gas in equilibrium ?

$(a)\;kinetic\;energy\qquad(b)\;momentum\qquad(c)\;density\qquad(d)\;speed$

## 1 Answer

Answer : momentum
Explanation :
At equilibrium, the momentum is conserved and hence zero.
answered Mar 26, 2014 by
edited Aug 9, 2014

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