Από τη Βικιπαίδεια, την ελεύθερη εγκυκλοπαίδεια
	    
	    	    	    
	    
[edit] Summary
| Description | Motion of gas molecules | 
| Source | English Wikipedia | 
| Date | August 25th 2006 | 
| Author | A.Greg, en:User:Greg L | 
| Permission | see below | 
The translational motion of fundamental particles of nature such as atoms and molecules gives a substance its temperature.  Here, the size of helium atoms relative to their spacing is shown to scale under 136 atmospheres of pressure. These room-temperature atoms have a certain, average speed (slowed down here two trillion fold). At any given instant however, a particular helium atom may be moving much faster than average while another may be nearly motionless. Five atoms are colored red to facilitate following their motions.
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