Multiple choice

In gases, particles vibrate _________.

  1. about their mean position

  2. about a vertical axis

  3. about a horizontal axis

  4. in any direction
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The particles of gas, either atoms or molecules, have too much energy to remain attached to one other. The move by translation, rotation and vibration, but in this case the translational motion is the most important. The particles are on average very far apart and collide incessantly many times a second. Because of the distance between them it is assumed that the forces of attraction between the particles are negligible.

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