Standards for measurement have been laid down to increase the precision and standardization of materials, roads, among many other things. Time for instance has been standardized so that we can easily measure the passage of time and is uniform throughout the world making it so that a person only needs to get used to the time zone difference instead of a whole new 'second' or 'minute'. Like time, distance has been standardized but it still varies from place to place.
UK mile vs Swedish mil:
The standard metric system with the meter, kilometer, nanometer, and so on is becoming commonplace around the world. Though this is the case, the UK, US, and many other countries are still clinging to their standards of measure. The UK (Imperial) mile is labeled as 5280 feet while the Swedish mil is now using a variation of the standard metric system with a mil being a equivalent to exactly 10 kilometers.
Standards of measurement help to increase precision and make life easier for people moving from one region to another. Also, it helps people understand similarities between measurements when speaking in the same terms such as 'this stick is 1 meter' instead of having to convert one distance into another. They help support internationalism and have many economic as well as societal benefits.
Resources:
http://www.ex.ac.uk/cimt/dictunit/dictunit.htm
http://en.wikipedia.org/wiki/Norwegian/Swedish_mil
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