For ease of understanding and worldwide/industry wide usage.
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International unit this is a unit used to measure many vitamins and drugs. It is a standarized measurement, therefore, what is in the tablet or pill is standard. This is not true for any herbal preparations, which are not standardized.
It enables us to measure things.
It is useless to measure anything in arbitrary units.
There isn't. The Assyrian army had words for "city units", "cavalry units" and such, but unlike the later Roman army's Centuriae, they had no standarized units with a fixed number of soldiers with a name to describe them.
it is important so you know the measurement and also if you get a question or something that says show the units of measure in data tables so they know you know how to do it because that is reallyimportant to learn and if not you will have difficulties in life
Square units measure area.
Bad
Area is a measure of square units.
The answer will depend on the units which were used to measure it as 10x10x5.The answer will depend on the units which were used to measure it as 10x10x5.The answer will depend on the units which were used to measure it as 10x10x5.The answer will depend on the units which were used to measure it as 10x10x5.
Standardized units of measure are important to engineering because if everyone was using different measurement systems, dimensions of different objects and inventions wouldn't be converted correctly from the inventor to other inventors or manufacturers. (Had to be fixed because who ever wrote the originally answer was a a$$ hole)
simply units....