Map of driving directions from Spring, TX to Houston, TX. Click here to show map. Drag the line on the map to calculate the driving distance for a different route. If you want to verify these driving directions or look for another possible route, you can try. Google Maps, Bing Maps, or MapQuest.
The second (symbol: s) (abbreviated s or sec) is the base unit of time in the International System of Units (SI).
Since 1967, the official definition of a second is 9,192,631,770 cycles of the radiation that gets an atom of the element called cesium to vibrate between two energy states. Inside a cesium atomic clock, cesium atoms are funneled down a tube where they pass through radio waves .