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Which one of the following quantities can be zero on a average for the molecules of an ideal gas in equilibrium? (a) Kinetic energy (b) Density (c) Momentum (d) Speed

Which one of the following quantities can be zero on a average for the molecules of an ideal gas in equilibrium?
(a) Kinetic energy
(b) Density
(c) Momentum
(d) Speed

Grade:12

1 Answers

Saurabh Koranglekar
askIITians Faculty 10341 Points
one year ago
In case of ideal gases the average velocity is always zero. Hencethe average momentum is zero.
Whereas average speed is non- zero so the kinetic energyalso non-zero, as these two are scalar quantities.

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