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There are a few reasons. Historical and cultural: different units were used at in different parts of the world at different times. Many of these "traditional" units were eventually replaced by the SI system. However, even within the SI system, there are different units which are appropriate at different orders of magnitude. For example, the metre is the standard unit for length but it is not the most sensible unit for atomic distances, nor is it appropriate for distances between cities. Furthermore, in astronomy or cosmology there are other units such as an astronomical unit (AU = average distance between the earth and sun), a light year (the distance travelled by light, through vacuum, in one year), a parsec (the distance at which a star appears to be displace by one second of arc between the two extreme positions in the earth's orbit).
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What is the importance of standard units in daily life?
standard unit is very important because it contains the same value,quantity and ect all over the world
What is the importance of standard units in everyday life?
For the simple fact that it's standardized, common, and easy to use. A liter is the same everywhere and it's easily converted to smaller units like millileter because it's divisible by 10's, 100's, or 1000's, which you can do easily in your head. A Gallon, on the other hand, has different amount in England, and it has 4 quarts or 16 fluid ounces in it.
Are there different types of decibels?
Decibels (dB) mean a logarithmic unit of measurement that expresses the magnitude of a physical quantity relative to a specified or implied reference level. Since it expresses a ratio of two quantities with the same unit, it is a dimensionless unit. Decibel is Decibel!
Why do we need standard units of measurement?
It would be quite confusing if everybody used different units - or different definitions for the same units. But that was exactly what happened in the past - for example, a pound in one country is generally NOT the same as a pound in another country.
Why did scientist agree to use SI units worldwide instead of the units common at their locations?
Scientists must be able to reproduce the results of experiments done by others in order to verify each other's conclusions. Using the same units worldwide removes the potential for error in converting between units or confusion between units which have different values in different places (e.g.: English mile, Irish mile, French mile, etc.).
