In the colum on the metric system http://www.straightdope.com/classics/a4_013.html Cecil explores the reasons why we (the US) has failed to adopt the SI system (for the sake of this post I am treating metric and SI as being one and the same).
The basic units in the SI system are:
- electric current–ampere
- thermodynamic temperature–kelvin
- amount of substance–mole
- luminous intensity–candela
Has any country fully adopted all of these units? Sure the United States as a whole never caught on to the distance or mass measurements. Since these follow a decimal system using them certainly makes life easier. But does anyone follow a decimal time standard? How many of you can rattle off your age in seconds? For a back-of-the-envelope I get mine as roughly 1 Gs.
If my memory serves me correctly, at one time the French tried to put a decimal time standard in place but it flopped. If the inventors of SI couldn’t pull it off could anybody?