Mass and MolesStreaming Video - 2013
Locked up in a vault at the International Bureau of Weights and Measures lies what may be the most important lump of metal in the world. The "master kilogram"-or Le Grand K-was created in the 19th century and is still used as the standard on which every other weight is based. But there is a problem with Le Grand K: what should be its unwavering weight has been changing over time. In this program, Marcus du Sautoy charts the history of the measurement of mass, touching on Newton's contributions, the adoption of the metric system, and the mole, then examines efforts by American and German scientists to redefine mass using a universal constant.
Publisher: New York, N.Y. : Films Media Group, , c2011
Branch Call Number: EVIDEO ACCESSVID
Characteristics: 1 streaming video file (59 min.) : sd., col. + instructional materials (online)