Wikipedia:Today's featured picture (animation)/May 14, 2007
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The translational motion of atoms and molecules gives gases their temperature, pressure, and the vast majority of their volume. Here, the size of helium atoms relative to their spacing is shown to scale under 1950 atmospheres of pressure. These room-temperature atoms have a certain, average speed (slowed down here two trillion fold). Five atoms are colored red to facilitate following their motions.
Image credit: Greg L Recently featured: Morteratsch glacier - Pāhoehoe lava - L'Hemisferic |