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They are used in MOST countries of the World. It seems that only three countries don't use the metric system (SI) yet.
That being said, in the non-scientific communities, as well as in certain sciences, certain non-SI units are used - for example, Celsius or Centigrade for temperature (instead of Kelvin); time measured in minutes, hours, days and years (instead of seconds); or energy being measured in kWh (instead of Ws = Joule).
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What are some reason that the si system uses metric uinits and not the English system?
Only three countries still cling to the "English" system, whereas the whole world uses metric. The SI units were established in 1960 as part of a review of the metric system used at the time; it uses metric units because it is the current version of the metric system.
How are roman numerals used in our society?
Some countries only use Roman Numerals, so they use it a lot.
What two units are used to express volume?
Some units are the cubic meter, the cubic decimeter (= liter) and the cubic centimeter (= milliliter).
The only unit that cant be used to express volume is?
There are many units that cannot be used to express a volume.There is something missing from your question to request the only unit.
What does ounces mean in math?
Ounces are an old fashioned unit for measuring mass. Fluid ounces can be used for measuring volume. These units are officially used in the US, Liberia Myanmar (Burma) and some Caribbean islands. Other countries use the International System of measures.
