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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 10335 Points
2 years 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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