Question

what is SI unit? why is better system of units?

Answer 1

Answer:

The greatest advantage of SI is that it has only one unit for each quantity (type of measurement). This means that it is never necessary to convert from one unit to another (within the system) and there are no conversion factors for students to memorize. For example, the one and only SI unit of length is the metre (m).

Explanation:

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Answer 2

Answer:

The International System of Units (SI, abbreviated from the French Système international (d'unités)) is the modern form of the metric system. It is the only system of measurement with an official status in nearly every country in the world.(i) It is a rational system, in which only one unit is used for one physical quantity. (ii) It is a coherent system, which means all the derived units can be easily obtained form basic and supplementary units. (iii) It is a metric system which means that multiples and submiltiples can be expressed as powers of 10.