The National Institute of Standards and Technology (NIST) is a United States federal agency within the U.S. Department of Commerce.
The institute was founded in...
EnergyLast Updated on 2013-03-26 at 16:16
In physics, energy is the capacity for doing work, where work is the action of a force acting over some distance. The term derives from the Greek energeia, or activity, with... More »
Bucket temperatureLast Updated on 2012-07-02 at 08:48
Bucket temperature is the surface temperature of the ocean as measured by a bucket thermometer. This can also be the temperature measured by immersing a surface thermometer... More »
MassLast Updated on 2012-06-09 at 19:31
In physics, mass (often defined as the "quantity of matter") commonly refers to two properties of matter which describe its response (acceleration) to an applied... More »
A Walk Through TimeLast Updated on 2012-03-22 at 11:14
The Evolution of Time Measurement through the Ages.
A Walk Through Time
Celestial bodies — the Sun, Moon, planets, and stars — have... More »